Panel 1: Jugganaut was previously mentioned in passing by Emp way back in Empowered
vol. 1, though I dunno if her costume, here, meets the description of
“sexed-up, skimpy little stripper outfits” that Emp was complaining
about. Then again, it's quite possible that she changed her costume since that time, or that she actually has a number of different ones. (Imagine that!)
Panel 2: In a rare turnabout from my usual pattern of behavior, lemme tell you the supranyms for these three supervills. No, hold on a sec, did you wanna guess what their names were, first? Fine, I’ll wait.
Their supranyms are, respectively, Baron Barrel, the Crabuate, and Green Gharial. (Okay, I concede that the latter monicker would be pretty difficult to have guessed, given that Empowered is a black & white comic.)