JLA vs Excalibur

Pictured line ups/versions/eras.
No prep.
No BFR.

pretty sure Hal, and Wally can solo. Maybe J'onn also

That's Barry iirc, but yeah, the Year One JLA were all treated as pretty uber in that book. There really weren't any weak links.

👆

Who is the Blond Chick? And what level was this version of Phoenix?