Scenario 1: Xavier: All freeze.
Well, scenario 2 would come down to if Adamantium > Kryptonians.
Wolverine then becomes a weapon of mass destruction when in QS's hands.
Wait, can't he just take WW's sword and go chop chop on everyone?
Or battle starts: Superman heat visions, Wonderwoman slashes with her sword. Hulk charges, Thor summons lightning, Iron Man repulsors, etc.
QS rearranges enemy team so that they hit each other = profit (although I can see Vision as being problematic in this scenario if he goes for the immediate phasing).
WW sword chopchop is still my go-to strat.
It comes down to Quicksilver vs Avengers and Justice League IMO 😄
And my money's on QS.