If Sisu are intent on pursuing things beyond the EU ruling, whenever it is given, City playing at the Ricoh can only still be a positive for all concerned. Sisu, it seems clear, will do what they will do irrespective of what happens to our club. Our return to the Ricoh would see Wasps make money from us. Gates increase so the club costs Sisu less money. Obviously all the associated businesses at the Ricoh benefit.
The solution therefore is perhaps for Wasps to see that Sisu and CCFC are two seperate entities. They can't stop the first pursuing the path they want to go down, but allowing the latter to play at the Ricoh is to everyone's benefit.
It really comes down to Wasps making that choice. What is the point of them losing the money from a deal with CCFC when Sisu are a juggernaut with no intention of changing course? It could also show them in a more positive light, the party that chose to take the moral high ground.
(This is not excusing Sisu. It is simply a recognition that they have no intention of doing what is best for the club, only their investors). Wasps stance seems to be one where everyone, including themselves, suffer for no obvious gain. Why would they want to do this?