No Mutants Allowed

I heard he's kept in a cage and is only let out for a little while before being shoved back in.

he probably died. That's my standard go-to explanation for missing forumers. That, or he was kidnapped by some fanatical guerilla insurgent terrorists for ransom money. As usual, they are probably demanding ridiculous sums

Last I saw/read he entered into the Battle Of The Noobs... O_O