Dwayne Johnson does love his TAG Heuers, but he's also just a watch lover in general. He's got a crazy collection and wears many other brands just as often or perhaps more often than TAG. He seems to favor AP Royal Oak, Rolex, IWC, and Panerai. Even brands like Breitling & Oris.
So despite the continued TAG sightings, I have my doubts an ambassadorship is in the works.