I read in the news page on the EastEnders website that right after the marriage they are leaving. I don't think its justt because the actors want to take a break. I think it's in order to be able to keep Shannis together. They are eternal and soulmates. If they stay in the square sooner or later they might get a storyline that spilts them up again just like with Kat and Alfe in order to keep the drama going and most people including me don't wat that. Just a thought.