CM Punk, who did not appear at last night's RAW, also did not appear at tonight's SmackDown taping in Toledo, Ohio, despite being advertised for the event.
WWE has since removed Punk from almost all of their upcoming live events and television tapings on the events section of their website, although he remains on the Elimination Chamber page. It is not known at this time if Punk is injured, or if something else is going on. The last tweet that he posted on Monday night stated, "Thanks for all the support. Keep being you guys, it's pretty cool."
Punk's contract is up in July, and he stated in an interview last week that he doesn't know if he will re-sign after it expires, and that "everything is up in the air."
UPDATE: F4WOnline.com reports that Punk apparently told Vince McMahon at last night's RAW that he was going home and left the show. No further details were available other then that he's been removed from all shows going forward.