A quickie question - hopefully not to many spoilers.,
I have not seen it yet but know the gist of it.
Where do you think they will go for the next phase?
I know we got Spider-Man, Black Widow, Eternals and a few other sequels with people that made it out alive.
Of course this leaves room for merging the FF and X-Men back into the MCU.
And if we get an FF and Evans is looking for work again, I heard he makes a pretty good Human Torch...
I suspect they will go in directions most people aren't really expecting, and I believe Feige has demonstrated he has the patience to set up the long game over a very long period of time. We've been calling these movies "phase one" and "phase two" but really they are all one big ten year story: the Infinity Saga. I expect to see less "phase four, phase five" distinctions (even if they call them that) and instead I think they will be constructing another ten year long mega story that we aren't even going to see the full extent of in phase four.
Here's an idea. I'm not saying this will happen, but it could happen, and it is mostly to suggest just how much room Marvel has to go in any direction they want. Endgame sets up the Marvel multiverse. We know there are alternate realities and alternate timelines, and we have hints that some of those are or become different universes, and some diverge and then collapse back. Some are created and then destroyed. Suppose there's a scientist in an alternate reality, and he discovers his reality is actually just a splinter universe from the MCU, and it will collapse and disintegrate. So he decides he's going to try to escape that universe and enter the main one. But when his ship escapes the end of his universe and he makes it into the MCU cosmology, he's altered by the process and becomes an MCU celestial being, like Ego. Except this celestial being has a cosmic hunger, and a need to feed on the cosmic energy of the universe.
Fortunately, the MCU is filled with the energy released from the Infinity Stones, and he can consume that energy on every world where it has collected. Thus he becomes a world-destroying threat that attracts the attention of Captain Marvel, the Guardians of the Galaxy, and Thor: the space faring Avengers. But eventually, he seeks the source of that energy and creates a herald who can search the cosmos for the strongest source of that energy, which happens to be the last world where the Infinity Stones were used.
There's easily ten years of material in there, and the new threat wouldn't just appear, it would be referenced and hinted at, then start affecting the MCU, then finally become an existential threat.