My understanding is that Ryanair is finished at SEN.
They need easyJet back or Wizz to open a base.
If Wizz is interested in DSA and CWL, I can't see why they wouldn't go to SEN and capture the string demand that has existed on the key sun routes that that are mostly used by the local catchment on that side of London. Good work for 3 or 4 320s; ALC, AGP, PMI, IBZ, FAO, AMS (if slots could be found), CFU and a few others selectively would be where the demand lies. They'd have this secured for themselves, IE FR and U2 would be unlikely to join them.