Virgin would be another option but I think they have bigger fish to fry.
They did have their 'Little Red' operation a few years back, would certainly give then the scale and equipment necessary to kickstart that again.
Bit of an outsider though IMHO, i'd peg Stobart for the takeover. Remember when their bid was rejected earlier in the year because FlyBe though they were being undervalued?...now the company is worth around 1/10th of the price, it would seem like a steal to them