Cant see that happening Dave. I might be wrong but it I think it would be unlikely.
Effectively if they moved to another league, they would have to pay back all the cash to CVC, unless they moved to the Pro 14 which is owned by CVC, but then the Pro14 is made up with clubs that aren't on the whole cash rich, bar a few, I cant see them wanting three cash rich English clubs joining the league to dominate. Couple in the fact that it may have implications on Six Nations availability for their England players, then it may not be a popular move.
The French league also has a salary cap, so cant see it being there either.
Aside from this, I am quite glad Wasps aren't going to go down this season. They are skint, something I have repeatedly alluded to over the past few years. They are losing all their best players, crowds are dwindling and results are poor. If they don't go down this year, they don't have a chance of coming straight back up and galvanising and so hopefully they will remain poor and pretty rock bottom for at least another season, crowds will further drop and hopefully they will look at the balance sheet and decide to go back from where they came from.