Lemme take a shot at it. Browns want Manziel to succeed, because he's more marketable. They let Hoyer go, he signs for 7-8M/year and they and get a 3 (or even 4th) round compensatory pick for him.
Manziel is anointed starter, is the second coming of Ryan Leaf, and get replaced by some poor sap of a 5th round draft pick the Brown get next year, who is in turn replaced by someone the Browns pry off the couch around week 10...let's go with Christian Ponder.
Have I got that about right?