Batman villains are not something to be trifled with. These Batman villains in particular, are a force of nature. Panem will never know what hit them.
The Riddler may seem pretty weak at first. But he has that pretty sharp mind he can use when pushed into a corner. Batman has himself admitted that Edward Nygma can become very vicious and shrewd at times, so much that even the Dark Knight has trouble dealing with him. Riddler’s obsession to take down teh Caped Crusader is the only thing that keeps him from winning his fights. If put in a setting where there’s no Batman to outwit him, he can easily take down the other tributes.
Doctor Jonathan Crane is an unhinged lunatic with a pretty weird hobby. Like every other Batman villain, that is. He is obsessed with the emotion of fear and believes he has a cure. He has created a compound called the Fear Toxin that induces in a person his or her greatest nightmare. Imagine if the Scarecrow unleashes a barrage of fear toxin grenades all over the battlefield. Coincidentally, years and years of using the toxin has made him pretty much immune to the effects of the gas. It would be a cake-walk for him. And if you think he wouldn’t have access to the fear toxin, you are wrong. Like other Batman villains, he is very resourceful. He has created the compound out of some basic chemicals in the past. Given the vast resources of the Hunger Games arena, he could easily do it again.
His abilities are not physical. This insane psychologist has understood the human psyche in ways one could not even ever imagine. In the arena, he will probably play mind games, using psychological tactics and warfare to pit one person against another until no one is left.
The world’s greatest mercenary would be a very bad opponent to face in the Hunger Games. He can turn any weapon in his hand into a weapon or projectile. His close combat skills are also nothing to be taken lightly, having fought Batman to a standstill at times. Deathstroke would go through the tributes like hot knife through butter. Of all the Batman villains, he would probably win the Hunger Games the fastest.
He is insane, maybe more so than others. But behind that badly done make up and malicious grin lies the mind of a truly evil genius. The Joker is not good at fighting but he is real good at laying traps and manipulating people. One by one, like a crazed serial killer in a horror movie, he would kill each and every tribute in The Hunger Games in the most brutal fashion possible. As far as Batman Villains go, if the Joker is in there, it is pretty much game over.
This is the guy who broke not only Batman‘s back but brought down an entire city all the while spiting at the face of the world’s most powerful government. Batman villains come and go but Bane has defied an entire nation. He is strong, exceedingly cunning, and a brilliant battle strategist. That is a deadly combination as far as Batman villains go.