Titan is a project that Blizzard have had in the works for a while now. Early this year they annouced they were going to be doing a complete over haul of the game. There had been no official announcements on what type of game this would be, but there was a lot of speculation that it would be another subscription MMO.
In an investor meeting held this week Blizzards president is quoted saying the game is "unlikely to be a subscription-based MMO RPG".
Blizzard's new vision for Titan: 'unlikely' a subscription-based MMO
I wonder what direction they will take? WoW has lost a lot of subs over this last year so they probably have seen that sub MMOs will not do any more.