Not new news, but it seems like every new article pushes the projection higher. This one says $200 million.
https://cowboyswire.usatoday.com/2019/02/14/dallas-cowboys-dak-prescott-contract-projection-study-vs-qb-peers/amp/
https://cowboyswire.usatoday.com/2019/02/14/dallas-cowboys-dak-prescott-contract-projection-study-vs-qb-peers/amp/