BenitoChavez
What business is it of yours?
If that's true, I think the only confounds are Steve and Loki. I think everything I wrote about Steve & Peggy above would still hold, because that would all have taken place before 2012/The Avengers (and provided that Steve was successful in returning the Stones when and where they belonged, but let's assume that for now). Loki escaping with the Tesseract in 2012 opens up... something. I suppose it depends what Loki the Trickster God decides to do with it, but he's almost certainly not going to put it back where it belongs and restore everything. That wouldn't be very like Loki, and it wouldn't be a very good show.
We also know that the next Doctor Strange movie is titled In the Multiverse of Madness and not In the Multiverse of Perfectly Reasonable Alternative Outcomes, and that it will directly follow the events of WandaVision, which will also be majorly weird (Kathryn Hahn in a Marvel movie? that's weird all by itself). The nerdosphere is speculating that WandaVision will be an adaptation of Marvel Comics' House of M. I've never read House of M, but I know it leans heavily on the mutant characters, so it wouldn't be directly transferable. Still, WandaVision and Loki and In the Multiverse of Madness could/will obviously take up the story from the ending of Endgame, so we don't need to work out the answer to every question ourselves. I hope. (And, as mentioned earlier, The Falcon & The Winter Soldier could also give us some insight into what happened with Steve & Peggy for all those years.)
So I like your idea. Whereas the new Star Trek movies took up the new, "Kelvin" timeline, the Marvel movies could choose to continue the original timeline and let the new, wrecked timeline(s) burn.
Loki is a similar deal. The time stone was taken from 2012 so when Loki teleports with the space stone it is in an alternate timeline. I've read somewhere that his show is going to take place in this alternate timeline but that might be unsubstantiated rumor for all I know.
As for Steve returning the stones and staying with Peggy in the past, well I have issues with that. The movie only says that removing stones is what causes timeline splits but it stays silent on if any other actions would cause a split. For example, if after going to the past one of the Avengers killed someone, someone important to the timeline. That surely would cause events to unfold differently wouldn't it? So how big of a change needs to occur for a split to happen? Does Steve going back to Peggy, even if he keeps a low profile the rest of his life cause a split? Does someone's mere presence displace some air molecules creating a Butterfly Effect that results in some severe change in weather patterns? Since the movie doesn't give answers, we have to fill them in ourselves. I say that any change no matter how minor causes a split. So taking the avengers taking the stones from a timeline, Steve returning the stones, Steve staying with Peggy in the past, Hawkeye's test jump in the middle of the movie, all those cause splits.
You posted a graphic a while ago that nicely summarizes the convoluted timeline nonsense.
I'm pretty interested by WandaVision. I saw a poster that makes it look like some unsettling 1950s Stepford Wives inspired type of deal. I got no idea how that is going to work as Vision is dead and neither Vision nor Wanda were alive in the 50s even in any split timelines. It would have to be something completely different like an alternate universe unlike anything we saw in Endgame.
