The IOM-LGW, INV-LGW routes are included in the Bacon 'purchase' by FlyBe
As the purchase has not been finalised yet, anything is possible, however unlikely.
It is hard to see how Flybe could not make money to LGW. Taking the London market as a whole there are some 230000 passengers per annum which must be way more than a lot of their regional routes.
And anyway, once Manx2 get their Heathrow slots everything will be all right on the rock