Batgirl: You drop the Flashbang and jump down into the room. You get all the way to the hostages and say your peice right before you get a glimpse of the Riddler up close. You start: you've read up on the Riddler before, and something is definitely wrong.
Solaris: you take a peak around the room, and don't see anyone sneaking up on you.
The Riddler and the Question are not far from the hostages. neither are the bears.
Behind Jimmy and Perry White is a third hostage you couldn't see from your position. He's an athletic youth, dressed in green, but with a technological contraption on his head topped with a question mark. His eyes are likewise whited out but with question marks whizzing across them as if across a computer screen. His hands are tied like Jimmy and Perry. (hint: this is Voda Vosas character. Release him and he can start in on this scene)
Before the other "League" members can arrive, however, you receive a swift kick from the Riddler... or whoever this is. (Roll Toughness save, please; or appropriate other checks as per your build, if you have said options)
The Riddler you remember is much less athletic, much slower, less fit, and much less coordinated. This person, while retaining basic similarities to the Riddler you knew, is taller, stronger, in every way enhanced version of the original: the Riddler with muscles.
Ah, how disappointing: another hostage while I wait for Superman. And a bat! I must say, Batman's taste has improved over the Boy Wonder. Who would you be, let me guess... Bat-girl? That's it, isn't it? Ha! Well, my dear: what's black and blue and red all over?