I think it's a given wallp, Scandinavia is way under served as we are all aware.
FRatSTN I have no idea to be honest, I don't know how many flights ezy runs through stn. No doubt Ryanair dwarfs everyone there so they probably don't have any worries either. My focal point was Luton, I don't see Ezy running scared or being bothered in the slightest about competition on 1 flight. LTN is their base, They are planning major expansion over the coming years and already dominate flights by a huge margin.
Buster that prediction makes a lot of sense but the airline industry never does, In 10 years wizz will probably be flying to the moon from LTN via jamaica and Norwegian will be called crawley express operating on behalf of British airways 10x a day to plymouth or some nonsense that only happens in the aviation world.