OK, I'll play.
I'd say that ultimately there's little/no risk for CCC in 'involving' CRFC as is suggested. CRFC need CCC as we know. Overall, it's apparent that all sporting clubs need the council onside as it means things can happen a lot more easily and quickly. Forget about needing CCFC to help develop their ground - without CCC onside it becomes immeasurably harder. Leaving aside right and wrong... pragmatically you'd have CCC onside before CCFC (or, indeed, *anybody* else) in such a scenario if you played the game.
Therefore, co-operation comes into it, and talking comes into it.
It's not beyond the realms of possibility that in conversations (informal) it comes up how much easier it would be for everybody, and how much more smoothly any planning processes could go, if there wasn't the distraction of legal action. What the other party to that conversation does from then on is, of course, up to them.
There is always the letter of the law wrt process, and then there's manipulating the edges of it... which does no wrong, of course - you break no rules, you do nothing that can be held against you. You have, in fact, done nothing but mentioned in passing what would be helpful.
Where, in that instance, is the risk to CCC?
Now, I am in no way saying this *is* what happens and has happened. But I wouldn't discount it absolutely as you seem to be. The wider context doesn't make it unlikely after all. Who loses to make that so?