yeah, what would have worked fine is in some live action thing a bunch of dimensions poof in through space tubes or whatever the bullshit du jour is, then as it get increasingly crazy the 90s cartoon x-men come in, old cartoon meme spider-man or the slightly-animated Cap cartoon, and then somebody who's straight up newsprint from a comic book page, hell have the crap tv She-hulk doing something stupid and then newsprint 616 She-Hulk just scoots in and bumps her off the screen
A mix of Crisis on Infinite Earths and FOP's Channel Chasers.
This could work if their intention was to end the multiverses, which they aren't planning to do due to their desperation to get anything, whatever that is, that makes people pay to watch their trash. And Disney so far has been terrible at it. They just can't.
Just compare NWH vs D&W. One is just the producers bringing back the former SMs because up until that moment, everything Marvel related was falling apart. D&W, otoh, is a meta film. It's a final stand for the Fox movies to retire them with dignity, to explain the audience that Deadpool (meaning, Ryan Reynolds) ain't going to the MCU and why, while also introducing finally the X-Men to the MCU as they're the next saga. In one, you can basically smell the desperation. The other slide through it like they didn't even mind. One thought "people are gonna watch this because people like this" vs the other being "please, please like this, we don't know else what to do".
Upcoming saga is the Mutant Saga and I need to remind you all that this includes the very obvious choices: Xavier, Cyclops, Jean Grey, Logan, Storm, Rogue, Gambit, Iceman, Jubilee, Shadowcat, Colossus, Nightcrawler, Magneto, Mystique, (perhaps) Sinister, and then the not so known mutants who might well be Cable, Emma, Havok, Banshee, Psylock, Magic, Forge, Bishop, plus more mutant villains (the brotherhood, Sabretooth, etc)
and the human villains (Striker, Trask, Kelly, yadayada) aaand, lesser known mutants who happen to be minorities because Storm, Bishop, and Forge ain't enough, so they have to be there, like Kamala, girl with hijab, black supergenius, Roberto, Dani Moonstar.
And Glob.
Plus, the Fantastic Four, the Thunderbolts, Spidey, Daredevil, Punisher, the Defenders, Shang-Chi, the remains of the previous phases up to Endgame.
They are just DESPERATE to recreate the final Endgame battle without realising that you're now introducing Phoenix and she can snap most villlains out of existence and be done with it.