I'm glad you like it.
Well, all information in the video is 100% true and confirmed, so something like that very much could be possible. I remember all the past GTAs having a Vigil Ante mission that became available when you entered a police car, and since this game is so much more expansive, I'd almost count on something like that being in there. I sure as heck would have fun with it.
It'd be even cooler if you could take the criminals back to your place and shoot 'em up or make them pay you off or something.