It really just depends on the take.
If Hitch says he’s got a cool take, I’m down for it. But nothing of his work up to this point really makes me think “Oh, he’s perfect for JSA” (unlike JLA, which I think he was perfect for – wide screen action is the definitive approach to that book, IMHO, where as JSA demands something more historical, and intimate).
But maybe he’d go in a different direction, and maybe it would be great.
Still, JSA in particular, I don’t think is very interesting unless it’s a historical project. That’s what makes THE GOLDEN AGE one of the best JSA stories of all time. It’s grounded in its period. A modern version of the team can and has worked, but I do think its at its best when it’s backwards looking. One of the few books I’m happy to allow to become fetishistic about the past.