Dawn discovers a terrible secret about mike. She is soon confideing in Demi who issues Mike with an ultimatum. leave or his secret will become public knowledge (its beleived Mike was involved with a murder)
Mike panics and grabs Demi, driving out of Walford with her.
Will Demi be found safe or is Mike more evil than first thought.
(its beleived this storyline will pave the way for Rosie and Demis exit, Demi is rumoured to be getting killed of in a demolition site accident)

There is a rumour on Digital Spy which could turn out to be untrue, so im posting it in the Rumour Mill until confirmed.