Avengers 5: Doomsday

[sdp]

To me even 15 years ago it seemed obvious to me that studios just needed to continue with comic book movies as if they were still set in the same world and recasting, keeping these characters alive adventure after adventure, giving nods to continuity but at the same time being lax with it. Like James Bond did it successfully, it was technically the same Bond despite taking place in different decades.
WB was kind of doing this with the original Batman movies when they transitioned from Burton to Schumacher. Batman Begins would've also been a great Batman to continue had Nolan not messed it up by giving Bruce an ending.
Hell the DCU should've been a soft reboot to the DCEU, just giving these characters none of the prior baggage but new adventures that technically the older ones still happened.

Originally Posted by ToTheNines

but they’re just throwing all of this together with zero buildup. What is going on over there?

They're desperate and in denial, they see that the MCU boom is gone and are trying to revive it at all costs.

Originally Posted by Andrew NDB

we didn't need an "ending" for all these characters.

The general audience wanted an ending, they'd been following the characters for ten years and were invested. They wanted a pay off. Even if End Game hadn't been an "ending" to most of the characters, people would've just gotten fed up and jumped ship. End Game gave them a conclusion to what they had been following and they loved it for it. The general audiences getting sick of the MCU was going to happen regardless, in fact it might've been more drastic had they continued it without some sort of 'end'.