I'll think he talking about the 838 versions of these characters but We're not even sure that 838 Monica even has powers in this universe and Bucky is probably not a Winter Solider in 838 as well, Now 838 Steve on the other hand...

Oh, so he’s saying they will be angry at Wanda for what she did in 838? Sure, those characters will be good minor villains (enlisted by a bigger enemy).

838-Steve is probably the Hydra Stomper, like in the What If...?-Captain Carter storyline...

Also, I feel like someone else other then Cyclops would take revenge for Xavier...I feel more like Logan or Magneto to help the other relatives of the Illuminati-slaughtering...

Isn’t 838 Steve dead?

Maybe have an All-Female team. Replace Mordo with Clea and Cyclops with Jean Grey, Moira MacTaggert or Emma Frost. As for Peggy I have no idea,...maybe Black Widow or Angie Martinelli, cause why not?

Keep Medusa, and Invisible Woman and Monica Rambeau, or have Carol join the team.

Well I would assume it would be an X-Men villain which would be a neat idea

MoM was literally her solo movie lmao

Not counting WandaVision

Also, what about the children? Don't you think Ahura Boltagon, Valeria and Franklin Richards, Legion and the other kids might want to avenge their parents?

Mcu Franklin Richards

^^ Franklin is a very peaceful person. He isn’t going to get revenge and be an idiot when he can fix all of the problems in 2 seconds flat.