Tennant, Radcliff Up for Bilbo Baggins?

According to LA Times' Hero Complex blog, the actor playing Bilbo Baggins for The Hobbit could be announced next week at the San Diego Comic-Con. Suspected actors include Harry Potter's Daniel Radcliffe, Doctor Who's David Tennant and Wanted James McAvoy. The evidence of this rumor? Absolutely nothing. Frankly its seems like made up crap for website hits to me as the scripting isn't probably not even finalized so at most the casting is probably still in the discussion phase.