I assume Indiana will sign both players. The rule has changed. You used to be able to sign one over what you have leaving. Since we have zero leaving, that would be one. But now, both can sign and Indiana has to provide their plan for how it will work. No idea what they report on that...
There were 600 some transfers this year; at least two guys will seek more playing time. Hartman is the only one I could see wanting to stay no matter his minutes.
IMO this is all an example of worrying about something for the sake of being worried. There's literally no scenario where it doesn't work out. If you aren't cutting it as a player, you are not guaranteed anything. Players have to hold up to their end of the bargain. If a kid is doing all he can do athletically and academically, and then he is jettisoned, that is absolutely not right. But that has yet to happen at Indiana and I doubt it will happen.