Well, my classes each contain about 70-75 real prospects. 2k's classes contain 120 players (which is pointless), so there are some fake guys bringing up the rear. Mostly, they have tattoos I did not want to use on other players or the dreaded invisible headband hair.
However, all fake prospects are edited down to like 50 overall or below, so that they will never be drafted or signed. Still, I do find in MyLeague the idiots in the social media feed will still comment occasionally on a fake player's injury risk. No worry, they will will not get drafted.
Just as an aside, work on 2016 v2 should be finished sometime tomorrow. In addition to the guys I mentioned, I plan on adding Rico Gathers from Baylor and Tyler Harvey from E. Washington in the spirit of march madness.