Yeah, but the BBC hasn't made an official announcement yet. This is all coming from an "unnamed source" at the Beeb, and is being reported by The Sun (UK version of The Enquirer). And, some are thinking this is an elaborate April Fool's joke on the part of exec producer Russel T Davies.
Still, knowing how fickle Eccleston can be, I wouldn't put it past him to come-and-go like this. Not a great move for a series just getting re-started again after 16 years...