What team/movie will take the Avengers place if Endgame is the last Avengers movie?

I would be shocked if this is the last Avengers movie. It WILL however, be the last one with the current roster.

I expect Iron Man, Cap, Thor, and Hulk to all go away.

As to who the new roster is, follow the money. What movies are in the works going into Phase 4?

Black Widow is getting a movie. So I would count her in. Captain Marvel 2 is likely as is Black Panther 2, so I expect both of them to be in. Spider-Man is going to be going strong, so I'm betting he's in. Dr. Strange 2 is on it's way, and I wouldn't be surprised if he's on the list. Eternals is coming, so I'm wagering that Sersi or Firefox will come over from that group.

What seems to be missing is the brawler. Though i guess that could be Captain Marvel. I would add 50/50 chance that Bucky becomes the new Cap, and joins the team. And with his arm (assuming Rocket doesn't buy it off of him), maybe he counts for that.

The Inferior Five would be good (pity they're a DC group).

Failing that, the Midnight Sons would make a refreshing change of pace.

It won't be the last Avengers movie. Like the comics, they'll just change the team lineup regularly.