Ryanair
Intriguing video placed on YouTube today by Ryanair pushing 16 places that 'you must see' in 2016. Cardiff is one along with Belfast and Newquay in the UK.
All the airports mentioned have Ryanair flights or will have later this year. BFS and NQY will both begin Ryanair flights in 2016 with the former becoming a base. In fact, some of the other non-UK destinations in the 16 mentioned are also new bases or new destination airports for Ryanair this year. However, one of them, Timisoara, won't commence until November and until then Ryanair will have no flights to that airport, unless something is announced for summer pretty quickly. Timisoara will be a new base from November.
Currently CWL has just one TFS rotation per week. It doesn't seem likely that Ryanair would expect many Tenerife residents to visit Cardiff (no reason why they shouldn't because it's a fine city) so it may be that something else is in the pipeline.
I can add nothing to the Flybe rumours, Letsflycwl.