Well let's remember at MAN, there are soon to be lots of terminal moves, with T1 eventually closing.
AA, IB and BA will be moving to T2, so, one would assume Vueling could head over there with them.
KL, ADR and AF will also be going to T2.
T3 is going to be pretty much Flybe, Aurigny, Ryanair and Jet2 exclusive going by reported requests from them.