Some random guesses
One of Manning, Brees, or Roethlesberger retires
Bills wave a pile of cash in front of Cousins and asks You Like That! before he eventually signs with Miami
Tyrod to Pittsburgh
Alex Smith stays in KC
Keenum and Bradford stay in Minnesota
Bridgewater to Arizona
Jets cut Hackenberg
Cleveland and the Giants pick Darnold/Rosen, or is that Rosen/Darnold?
Bills do not draft a QB on day 1.
Rumors start that the Bills are trying to acquire Dalton for a second or third.
Bills do not draft a QB on day 2
Rumors continue that the Bills are trying to acquire Dalton for a 2019 pick
Bills draft a developmental QB on day 3
Bills sign Hackenberg and go into camp with Hackenberg, Peterman, and a developmental QB