The last game in the series, Fable: The Journey, arrived back in October of 2012, which raises the question of why the Microsoft-owned developer would announce brand new forums for an IP that's all but fallen off of the radar. Don't forget, though, that E3 is next week, and Microsoft has $1 billion worth of games coming to the Xbox One. The fates may dictate a return to Albion very soon.
Update: That didn't take long. Lionhead is teasing a Fable HD remake.