Alan and Thor are fairly comparable, but I'd give IM the edge over Hawkman and the non-fliers are pretty much irrelevant once the big boys take to the air. Jay could take Cap and Hawkeye pretty easily though.
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"And then there was nothing. A once broken something now void.
And on the first day, Doom spoke... 'Be.'
And then there was life."
Thor and Alan prior to his "The Dark Things/JLA & JSA crossover" amp roughly counter each other out, imo. Thor's got his energy manipulation/absorbing feats, but Alan doesn't have a typical GL's recharging limitation and his upper limits are pretty high end.
Alan then came back around and pretty much obliterated him.
It's a running theme with JSA arcs; Alan usually gets slapped around and taken out, then he comes back and begins wrecking crap. As that Alan had tamed a portion of the Starheart greater than ever, he was already safely beyond his "Sentinel" power levels, so Scythe beating him, as weird as it seemed, wasn't really a bad showing.
I give the majority to the JSA. Jay will blitz Iron Man, Captain America and Hawkeye, unless of course he trips. Anyway, Alan will stalemate or defeat Thor with the help of Hawkman. Carter can distract Thor long enough for Alan to punch his face.
Honestly, I don't get the Thor wanking, but that's just me.
That's exactly what I was thinking, add in Hawkman and team one takes the majority. Although, Carter isn't on par with any of them he'd be pretty decent back up. He'll distract Thor long enough, which will benefit Alan.
Thor and Green Lantern go at it in the air and neither of them are able to budge. Same goes for Iron Man and Hawkman. Flash takes out Cap and Clint before Wildcat even knows he's in a fight. Iron Man, despite likely being able to beat Hawkman after a long hard fight, still hasn't managed to put him down yet. Jay then runs in and speed-blitzes the hell out of Tony.
This of course leaves Thor all alone. Thor would stomp any of the other JSA members, but with a Green Lantern member there he gets overwhelmed by the numbers.