You understand that Trump has nothing to do with picking who is on the rules committee?
Anyway, I could very well be wrong, but as I said, I believe that “most likely” there will be a significant number of Cruz supporters on tbe rules committee. Just guessing it will be somewhere between 25 % - 50%. Should know in a few weeks.
Trump has many many delegates on the rules committee. The pressure will be on everyone to unify. That’s what will happen. Ted Cruz is going to be lucky if he is not persona non grata.
I know at the Washington Convention most of the Cruz delegates look forward to “unity”, but also want to be involved in developing the party platform. Many mentioned keeping the wording in the platform about no abortions, and not accepting some of the things Mr. Trump has mentioned regarding allowing abortion for rape, incest or the life of the mother. So things like that the Cruz supporters (and others) will still be involved in shaping things.