Canberra - The rationale Virgin have given to move Vegas to LHR is that they think they can attract more premium passengers, and the 787-9 is certainly more premium heavy. The next most 'premium heavy' route at Gatwick would be Barbados - so if anything else moved, I would expect it to be that.. Also Varadero has gone - the frequency has been given back to Havana.
You could imagine VS selling the beach fleet to Virgin Holidays though.
BAengineer - Often wondered if BA could make a go out of somewhere like Los Cabos or Puerta Vallarta (especially considering the upscale resorts like Punta Mita).