Cyrano
I'd agree with you on this. The new investor at Cityjet will certainly not allow Flybe to steal one of their most important and long established routes from them. Cityjet did exit the route before at some stage.
Ironically, Flybe (JEA) have been on the route before in association with Aer Lingus I think it was ...
BA came at the start of the financial crash in 2008 and abandoned the route mid season. I think it will require quite a lot of cash burn to get Dublin originating passenger into the habit of Flybe or even checking Flybe for pricing. In the mean time the passenger gets to get a better deal. Clearly that wont be sustainable in the longer term...
EI-BUD