Ihnen wasn't a good player pre 2 knee surgeries. Fox has only played at a much lower level, and that was before 2 knee surgeries. I expect very little from either one of them going forward. Betts is very raw.
Now that Battle and Cooper are participating in SR night, neither are likely to come back. It's not like they are fringe NBA prospects, and I don't think they would be participating tonight if they were coming back.
With Evans decommitment, I'll be surprised if Henley is back. He's the most likely of the 3 to return though.