Actually Kroenke hasn't said anything of the sort, but if you want to get technical, I would say if the NFL were to tell Stan he cannot go and they will fight him in court, then Stan probably would accept that decision.
In the end I don't think they will tell him no, and if they do he may threaten a lawsuit. I'm doubtful he will actually go through with it though.
Originally I felt that if the stadium starts construction and the NFL told him no, then he'd probably fight them because that's a lot of money and he'd be past the point of no return. Since they're likely to move up the relocation date, it's unlikely he starts building before they give their blessing to one of the sites, therefore I think he'd probably exercise his backup plan if they say no.
In other words, I don't expect Stan to just up and move. That opinion was based off the idea that Stan wouldn't build a 2 billion dollar stadium just to be told he can't go there. Since that is no longer likely to be the case, things adjust. New information means molded opinions.
Don't get so upset bro, aren't we all going off what the media says? In terms of credibility, that's typically established when multiple sources are vetting the rumor. Right now from my research it seems this rumor can be traced back to Bernie. Although now that Peacock has mentioned it, he may have been the one to feed it to him originally. Either way, when guys who are independent of this (not LA or St Louis) start discussing the rumor, I'd say it's been vetted enough to my personal satisfaction.