Not that anyone really cares about this from a FF perspective, but having done some reading, here's what I think will happen with Coleman.
Dallas will keep him while he is suspended. They get a roster exemption, so roster spot is not a problem. Once done with the suspension, Dallas gets a 1 week decision period. They will either cut him then (most likely), or, if they've had a lot of injuries or whatever, they activate him and clear another roster spot somehow.
What I'm not sure of yet is, if he's on the roster but suspended, whether his contract gets guaranteed because vet contracts are guaranteed if they are on the roster in week 1. Thats the ~$800K question.