I don't suppose there's any chance the 'Nova is J. Todd?
Sure, the obvious flaw with that would be that Jason was around pre-IC and he's obviously still around one year later, but...

Also I'm not sure what his interest in the power gauntlet should be... I thought Manhunter Kate Spencer had some sort of power gauntlet that had come from Batman somehow, but then again that doesn't mean Batman couldn't have kept a spare pair.