Who'd win? Super friends get wonder twins, politically correct charactrers(ex:apache chief), the Gleek, wonder dog, The narrator, and Wendy/Marvin.
JLA consists of just base 7 members. Characters are only as powerful as portrayed in series.
Who'd win each fight:
JLA batman vs SU Batman/Robin
JLA Ww vs SU Ww
JLA superman vs SU superman
Martian manhunter vs black Vulcan and apache chief, Gleek, Wendy, Marvin, wonder dog, and wonder twins
JLA flash vs SU flash
JLA green lantern vs SU green lantern
Hawkgirl vs Hawkman
And JLA aquaman vs SU aquaman for kicks (I know he's not one of the 7)