Half an hour after Tom Brady advanced to his ninth and final Super Bowl as a member of the New England Patriots, while dressed in his AFC champions T-shirt, he asked an Arrowhead Stadium security guard to escort him inside the Chiefs’ locker room. Brady had asked to speak with Patrick Mahomes, a gesture as notable for its symbolism as the literal act. Here was the man who had dominated one generation igniting a conversation with the man best equipped to own the next. You’ve probably heard that story. But you know what often gets lost in its re-telling? The oddsmakers had predicted the next gen…