Details of the game are scarce but the official press release states that Doctor Who Worlds In Time will let players "follow in the footsteps of the eccentric and brilliant Doctor by travelling through time and space, exploring new worlds and encountering many alien races, both friend and foe." The game will launch sometime later in 2011.
In 2010 the BBC and developer Sumo Digital released a four episode downloadable PC game series, Doctor Who: The Adventure Games. A second "season" of the adventure game series is slated for release later in 2011.
[Via email press release]