It will happen its just not been announced yet. SOU site has it on the timetable and routemap and if you google 'vueling southampton' you will see they have already made a destination page for it just not linked it to the rest of the site, hence why its not on the routemap and drop-down menus. That page says 'the route is not yet on sale, come back in a few days' and has done for the past couple of days.
Also, in the Flybe thread it was mentioned that they will add Tours (TUF) to their never-ending list of french destinations next summer!
