The Wonder World heroes were on a scale so vast that the Flash and Green Lantern were on a scale comparable only to their shrinking guy; supposedly they were the greatest heroes the entire universe had to offer. Then again, other than what Adam 1 says about them, their only feat is the Glimmer running "perpendicular through time," which, while I'm not entirely sure what it means, sounds pretty awesome.
I dunno. Based on just how they were described, they should win without worries, but there is really not enough information to judge.