There is rumour no official statement however of possible new type of aircraft to be needed at Flydubai by 2020 in a plan to expand the airline operations beyond the current 5.5 hour radius of Dubai to serve secondary major cities in Asia and Europe.
Sure this is going in to Emirates territory, but I do believe there is a market for a Flydubai long haul service to secondary hubs.
Would personally like to see a Fleet of Flydubai 747-800 serve this need should it materialise...