I don't know if Kroenke holds all the cards, but I think he holds a lot of them. Ultimately if he feels necessary, I wouldn't be shocked if played dirty. I also would say if he starts construction on the stadium, then the point of no return has been reached, and he's going. Which is why the NFL is smart to move up the relocation date, if you're gonna tell him no, you gotta do it before December.
Ultimately I think he'll do enough to woo Goodell to his side, which would bring over the vast majority of owners and give him the go ahead. It's not a done deal, but it is the best one on the table now. It's just harder to justify the Rams moving than the Chargers or Raiders. The NFL has already somewhat set themselves up to handle that, but its still not an easy a sell.
We'll see how it all goes down, I for one will be excited when it's all over. We're about halfway through now, and it feels like an eternity.