Magneto Family vs. Justice League

Magneto, Scarlet Witch, MCU Quicksilver, FOX Quicksilver, and Polaris (The Gifted)

Vs.

Superman, Wonder Woman, Flash, Batman, Aquaman, Cyborg and Shazam

Who wins

Fight takes
Place on neutral ground

Bane dies.

Oh yeah, after the funeral, DC beats the Marvel guys.

I'd day it depends on how much faster MCU Quicksilver is compared to Flash/Superman(at least to my knowledge DCEU Flash hasn't been as quick).