If River Phoenix liked all the Batman characters, what kind of superpower would he have liked to have?

River Phoenix once said to interviewers in May of 1989 that he had grown up with the Batman TV series, and that he liked all the characters (meaning both the heroes and the villains). However, I wonder what kind of superpower River would've wanted if he had gotten the chance to voice a character in the Batman franchise (especially if the character was a vegetarian, like he was in real life).



What do you think?If River Phoenix liked all the Batman characters, what kind of superpower would he have liked to have?
The power to not drop dead from a massive drug overdose in front of the Viper Room would probably be high on his list. It's a pretty limited superpower, but one which would have made all the difference.