<p>So by the end of Avengers: Endgame, it appears that the Avengers have perfected time travel, and whether they chose to do it or not, they are able to do it whenever they want. So with that, would that mean that we could then be introduced and crossover with other heroes throughout time? We could see the Avengers go to the Wild West and team up with the Two-Gun Kid, or we get more from that "Braddock" namedrop in the 70's, or go to the distant future and see characters like Spider-Man 2099. Especially if they ever decide to do Kang the Conqueror as a big bad. Then we can see characters cross between timelines or come to the present as it's been established that it doesn't impact the main timeline, but all be apart of alternate timelines that can be restored whenever. I don't know, I just think that they can't just open this concept and never come back to it. Obviously I don't want it to be a quick solution for every movie, but it should at least be used eventually (like with Kang, as mentioned). What do you think?</p>