He said he was master of time and space. Altar the past, wipe memories, bring back the dead he claimed he wasnt omnipotent yet but still leagues above these guys.
I bet I'm the only person that read that issue . He owned Captain Comet by warping reality and making a duplicate JLa to wreck him. He then healed Comet then started the process over again.
he also owned captain comet, bizarro, the weird, etc. with mere gestures. though synnar and the weird ultimately bonded into a singular being at the end of the last issue... don't know if starlin will ever extrapolate on that or not..?