I loved Brave New World, I kind of get why some people didn't, there were behind the scenes issues, but for me, the movie still worked. Personally, I want to see Anthony Mackie's Cap get his trilogy, because he deserves it. I genuinely think that if the Multiverse Saga had a bit more of an idea of who the main characters were, and Sam was one of them, he certainly would've gotten a trilogy, or would be close to finishing one by now.

I think that if he does well and his character is liked well enough in Doomsday and Secret Wars, they'll have a crack at Captain America 5, and if that goes well, then 6.

Sure, they are recasting Steve eventually, but before that happens, I would like to see more of Sam as Captain America before they go back to Steve or have them both share the role.
Would you like to see a Captain America 5 and 6 to finish out Sam's Captain America Trilogy?