By Jimmy Traina Greg Olsen keeping the seat warm for Tom Brady could lead to some wild scenarios. 1. Joe Buck and Troy Aikman went from Fox to ESPN. Al Michaels went from NBC to Amazon. Mike Tirico has been elevated as the voice of Sunday Night Football. Kirk Herbstreit added an NFL gig and joined Amazon. Kevin Burkhardt became Fox’s lead NFL play-by-play man. And then Tom Brady and Fox announced a shocking marriage. There was still one domino left to fall after all these moves: Who would become Burkhardt’s partner on Fox until Brady decides to hang it up for real? That domino fell yesterday w…