Okay, that seems like a fairly original idea, but what next? How does this impact the plot, just because Petunia now tolerates Harry that doesn't mean Vernon and Dudley will. Colour me intrigued though, I'd at least take a look at a story based on that premise.

 

Harry Potter's life has been hard, but things are looking better as he approaches the age of eighteen. His grades are above average in Stonewall which would allow him to enter a decent university, he finally got his childhood friend to go out with him and thanks to his two jobs he has enough money saved to elope with her as soon as they turn eighteen. All goes to hell when three people who say to be from the future, tell him they are his two best friends and his wife and that he is some kind of prophesied magical hero.

Ron, Hermione and Ginny are in the department of mysteries' time chamber helping hermione with something, when they go out of the room everything is changed. Wizards rule over the muggles, with strong anti-muggle/muggle born laws (kind of a Dystopian future), They soon find that according to story books Voldemort Returned earlier but was defeated by Dumbledore. In truth Voldemort was able to defeat Dumbledore and take into his appearance, infiltrating the ministry and becoming the new minister. they come to the conclusion that somehow Voldemort was able to affect the timeline and decide to go and fix it.

Hermione comes with a way to send their memories back in time to stop voldemort (Years before Harry comes to Hogwarts) but unfortunately something goes wrong and they end up only a few months before the end of their seventh year.

• When they travel back in time they are separated Hermione is in the muggle world as she wasn't allowed in hogwarts while Ron and Ginny are in hogwarts
• Harry Never received his Hogwarts letter because Voldemort was posing as Dumbledore
• Harry doesn't want anything to do with that until some Death Eaters try to harm his Girlfriend
• The turning point in the story will be when they kill Harry's Girlfriend and he dives fully into the war seeking revenge
• Voldemort didn't kill Harry right away because he knows of the prophecy and about the power of love that protects harry so he is waiting for harry to lose that protection
• There is a small resistance group that is trying to stop Voldemort, Hermione is part of that group
• They can't use the method to jump back again because their mind wouldn't be able to handle it.

 

I was thinking of 'For the want of a nail' type of story, with small changes resulting in big consequences.

 

Did Petunia know, that Snape was a Death Eather or did she just know him from their days of childhood?

Alternatively Lily and James face the possibility of death in the war and make what they think necessary precautions. One being, telling Petunia the current state of affairs. During their conversation Lily regrets the path Snape took or James makes a biting comment.

Summer after first year, Harry has to help with dinner (cutting onions to make it petty) and makes an offhand remark about potions with Snape.

"This is almost as bad as Potions with Snape, the greasy git."
Suddenly there was a clatter, startled he looked to his aunt.

Petunia transforms Harry's dislike for Snape into hatred, because that bastard had a part in his parent's death.

 

James and Lily did not know Snape was the one who overheard the prophecy. According to JKR, either through Pottermore or an interview, Lily had convinced James to put aside his old hatred of the man right before their deaths, too.

 

Why would she do that? He was a Death Eater. It's not like she pushed him towards that path in life.

 

I don't believe she knew he was a Death Eater, just that he had become bigoted in school, and that he was perhaps on the road to becoming one. I also think that Snape was going to be asked to be the godfather of the second Potter child, as part of an olive branch to the man. For the life of me I can't remember the source though, or find it. It might have even been a tweet by JKR.

 

I don't think I've ever been more glad for Lily's death than I am now, after reading that, provided it's true.

 

Shit man, nothing wrong with reconciling with a childhood friend. Consider what direction canon might have taken had it happened.

 

I agree; while I believe in forgiveness and second chances, you must draw a line somewhere.
As for Harry and Petunia, considering she was estrangled from her sister, I doubt she knows much about the changes in Lily / Snape relationship, but she probably knows he is a Death Eater. If anything, Harry will start trusting Dumbledore less, because he allowed a Death Eater to teach.

 

...to be picky, Harry did know Dumbledore was allowing a Death Eater to teach and this didn't lead to a break in trust.

 

True, but that was after spending several years at Hogwarts at that point.

Now, imagine what kind of relationship would Harry have with Dumbledore, and Snape, if he knew right from the start, not the exact details but the general outline, of how Snape was effectively one of the elements, a key one you could argue, responsible for his parents' deaths?

 

Imagine what happens when Ron or Hagrid tell Harry rumours and stories about Death Eater. Will there be enough trust in Dumbledore to summon Fawkes to the Chamber Of Secrets? This might be a very short story.

 

That Snape was supposed to be the godfather of the second Potter child is a rumour that was started by someone not by the name of JK Rowling. I don't believe she's said anything about James being willing to reconcile their differences, and I doubt Snape would be, either.

 

I never believed it was a loyalty to Dumbledore that summoned Fawkes to the Chamber.

 

HP/Stargate Fusion, HP dominant:

The Veil of Death at the ministry is actually the Potterverse version of a Stargate, which connects to a big network of gates all around the milky way galaxy.

It turns out that the galaxy is strongly dominated by magic users who enslave muggles to do their work. These are the Goa'uld.

Basically, blood purity on a cosmic level.

After Sirius fell through the veil during the Battle of the Department of Mysteries, he somehow ended up on one of the Goa'uld-controlled planets.

They capture him and use powerful legilimency to extract knowledge about Earth from his mind.

The Goa'uld are shocked to discover that not only muggles are much more numerous than wizards on earth, but also that wizards seem to live in hiding and earth muggles do not know that magic even exists.

TL;DR:

- The Ministry starts its own Stargate Program and explores various planets
- The Goa'uld plan to take over the Earth and end the Statute of Secrecy.
- Dumbledore and Voldemort are forced to fight together against the Goa'uld menace.

 

Considering the way he treated Harry throughout Hogwarts I'm glad he never got any godfatherly responsibilities.

 

Making someone the godfather to your child is not something you do because you want to reconcile a broken friendship, it is something you do because you trust that person to take care of and be responsible for your child in case something happens to you. It is a major responsibility and tbh James would never trust Snape to care of his child and he's not going to do so just to appease any guilt Lily has.

 

Lily wasn't the one with guilt.

 

Are you saying that James felt guilty? There's no evidence for that whatsoever and Sirius never displayed any regret over his behaviour towards Snape in their school years. In fact, even twenty years later Snape and Sirius still hated each other.