I'd suggest taking this in a more Kane-type direction. He can be arg and crazy and scary, and folks in the locker room are terrified of him, however he can be face whenever he damn well pleases lol
Basically, when you tear through the locker room and prey on anybody who's alone at the time, eventually becoming the federation bogyman (not the wrestler, the original lol) the camera blanks out and later in the show returns with them trussed up, just waking up and terrified/ pissed as hell and there you are with intimidating scalpels and whatnot, ready to give a deep philosophical and sadistic one-liner, rant, whatever floats your boat.
Actually mutilating other players in any way'd probably be pushing it, but scaring the pants off em and making an impact is just what the doctor ordered.
I am of course saying this as a guy who's just coming in and hasn't seen what you've been doing thus far. This idea would be a great way to make a comeback or something similar, attacking random folks until one of em sparks and ignites a fued. If you can think of a way to tie this into what you're doing currently, props to ya