Assulin for sure. Probably would've been in the squad had it not been for that fucker that injured him just when he was heating things up.
Razak, most certained prospect to make it. Pass range is so nice from what I seen and he's pretty clever and tricky for a CM/DM.
Rekik, Suarez, Roman, Henshall I'd like to see but they're younger so we can wait.
I think after next year when the pressure's calmed down a bit is when you could see Mancini playing youngers more often.