As for the next fight, it's gotta be the Flash vs Quicksilver, which means we're gonna watch Quicksilver get absolutely destroyed
Unless they yank Flash out of the DC universe since all his speed is connected to the Speedforce which is only available in the DC universe. The Flash is my boy but in a Marvel/DC crossover comic he was without his speed once he got to the Marvel universe and had to wear a backpack that siphoned the Speedforce from the DC universe. Depending on how the scenario plays out and if Quicksilver Can 'drag' the Flash into his universe, then Flash is fucked. But Quick doesn't know that, so why would he? And if they don't start it off with Quick zooming in from his universe the yeah, The Flash is going to destroy. Endgame Flash is stupidly ridiculous.
I don't follow Marvel so I don't even know if Quicksilver can travel through time and through the multiverses but I assume he can, yeah?