Wikipedia Page shows that Jet2 have routes planned from Cardiff for May 2012. however, i think it has been edited as there is only mention on the CWL page, not on any other of the routes.
It would be brilliant if they came to CWL and would probably be their top choice out of CWL and BRS. The apron needs extending at BRS, there is no space. CWL could be in for something here, even if not this early !