I think both.
Decker (1 and 2 are obvious)
Smith (not sure if he'll be the 3, but he obviously isn't going anywhere - in fact, might be PUP to start)
Thompkins (think they keep him for his size and blocking)
Enunwa (will be on the field more than Smith and Thompkins, but doesn't really factor into the WR "depth chart" due to his status as an "H" back / quasi Tight End.
Peake (think he sticks due to rare size speed combination, and ceiling to maybe one day replace either Marshall or Decker).
Marshall (think he sticks as the team's main punt returner, which we don't have, special teams ace, and swiss army knife)