If you are Rooney and are in this "don't feel wanted" crap then you are more likely to go to Chelsea if he were to leave Man U and remain in the UK, purely because Mourinho has shown him serious man love with the "its Rooney or bust" comment, that will fill the void in his heart lol, also there is a bonus you are a good chance for silverware.
Someone raised Dzeko on here, there hasn't been any indication he wants to move on, however a memory from last season was he wasn't comfortable being 1 of 4 strikers with Balo, Tevez and Aguero. Funny how it is Dzeko, Aguero, Jovetic and Negredo. If Dzeko is serious about wanting more game time he will surely move if not now but in the January window at least.