I don't see him going Ertz for Kittle and some other throw-ins. Hopkins value is increasing weekly as he's back in 2 more weeks, and he's gonna be healthy, hungry, and pissed off.
Maybe it's overpaying this early, but if I were the other team, it would take something along the lines of Ertz/Chubb for Kittle and Hopkins. I'm not even sure that would be enough - but you know the other managers better than I do.