Might be wrong but can't see Keaghan leaving us for the foreseeable future. Unless his injury has gubbed him, his energy will mean he will continue to be a useful player regardless of the level.
There were rumours around Poplatnik leaving so that's one I could see. McMillan is the only other obvious one, if he wants more game time given Devlin appears to be undroppable.
Maybe loans for Kabia & Pignatiello even though Martindale said they would be around to fight for their places.