Well, it'd depend on the type of character I'm playing, I suppose. If I was a face, one of my options would be "I'll Attack" By 30 Seconds to Mars. I'm not a fan of the band, I just like this song, and also some of the lyrics could be associated with wrestling/ a wrestling match.
Also, this is pure craziness, and would probably fail immensely, but I think it'd be a funny for a while. Say there was a stable, who weren't necessarily heel or face (instant fail right there, I guess, but this is my imagination, dammit!), who were sort of like the APA, in that we could be hired to beat down on people. Or pretty much anything. I'd call us The Jungle (this is getting worse by the minute), but just so I could have "Welcome To The Jungle" as our entrance song. I could just imagine it, as we're coming out to beat some ass..."Welcome to the jungle, we've got fun and games"...
Also, if I were a face, yet again, and I was playing a slightly psychotic (in the funny sense...if there is one) character, I could have "Crazy Train" as my entrance theme. I can imagine it now..."ALL ABOARDDDD (followed by maniacal laugh)", which gets the crowd going (assuming there would be a crowd), then the lights go down as the drums start, and then some flashy pyro starts going crazy as the guitar kicks in, then when it all comes together I come out, looking like a lunatic.
All in all, I think it's safe to say thank fuck I'm not a writer.