I found it interesting that Warwick Brady, in a feature on Stobart Group on the the Proactiveinvestors website, is quoted saying that among Stobart's aims was the creation of "a Virgin-branded network to complement our portfolio of airlines at the airport (SEN)". That's the first time I have seen any specific reference to their plans for SEN directly arising from the creation of Connect Airways (the vehicle created for the purchase of Flybe and the embodyment of Stobart Air within that entity).
Hopefully the exact nature this "Virgin-branded network" will become clear before too long.