I would really get a kick out of a JSA animated series. The hard part for me would be choosing between the Golden Age JSA and the Modern Age JSA. From a story-telling standpoint, the Golden Age JSA might be a bit easier to deal with (you wouldn't have to continually have to allude to the team's predecessors as they would be the first generation of heroes). OTOH, the Modern Age team is a bit more diverse.
Hmmm...maybe if this hypothetical show had a mix of both (a number of flashback episodes dealing with a Golden Age incarnation of the team) it'd work out.
"My only regret is...that I have...boneitis!" - That Guy (a.k.a. Steve Castle) Futurama 3ACV21 Futurestock