I don't think OW get total control of T3, AA and CX will stay there but there will be a lot of the rest who fly long haul there too. Without substantial rebuilding that isn't going to happen any time soon, T2 would not work for the number of 747's or the MH and VS A380's for which gates are now being built at T3. SQ are not moving quickly to T1 either - presumably because of the gate issue and their A380's but they will go eventually.