The bit about Mike "being part of a live show" again could really go two ways. Realistically, it
could just refer to him being warm-up guy again because technically it's still "doing live shows", the only difference is that it's off-screen rather than on. The fact that Mike's response says "see you there" also points more to the fact that he's interacting with audience members, i.e. warming up the crowds.
In saying that though, for all I know it could be true that he is indeed hosting something again. If so, I wouldn't mind it. As much as I know he annoys people sometimes, it'd be nice to see him hosting something again, even if for old times sake and to see someone different to Sonia being part of the show at times.
Adding to the comments about 2012 HM's hosting something, I'd definitely say Benjamin, Stacey and/or Bradley are potential candidates (more so because of their so-called "popularity" among both the teenyboppers and the crew - and I've noticed everyone on the team seems to lovelovelove Bradley, judging by some of the tweets I've seen **vomit** but then again, he does have a stutter which would jeopardize a hosting role... he was still easily one of worst HM's ever imo). I would have also definitely suggested Michael too (another *vom*), but hasn't he just recently gotten a job on Nova or something? Not sure how that'd affect it if so.
In saying all this too however, I am simply theorising because in actual fact I seriously hope NO old HM's take on any hosting roles on BB whatsoever*!
(*Maybe everyone except Ray though. He can host an Uncut show. Featuring only himself. Nude.)