Why do you think that? He was recalled straight away by Morison and played almost every minute under him. Don't see why the player, the manager, or the club would want him to move on?
Of the 5 you mention there, I actually think Denham has got the most potential and will go the furthest.
I'm still 50/50 on Colwill. I feel that he could either develop into a top PL talent, or burn out pretty fast, kind of like a Championship Dele Alli. This is going to be a big season for him.