In a continuation of storylines, WWE has a kayfabe article on dot com where they note Big Show has been sent home due to "repeated head trauma." According the article, Show isn't cleared to compete.
This picks up on Randy Orton connecting with his punt to Show's head at Survivor Series and subsequent kick by Alberto Del Rio at Monday Night Raw. Both were scripted spots and no legitimate injury occurred (at least from what we know at this point).
I was told prior to this week's Monday Night Raw the Orton/Big Show program was seen as a "flop." More details are available in our exclusive Survivor Series notes.