No Trump will control the rules committee. Cruz will be pretty much shut out as he is unwilling to even endorse the nominee or do anything to unify the party. The nominee runs the show. Most delegates will be eager to unite with Trump and put Ted in the rear view mirror where he belongs. Only a handful of people on FR have been unable to accept reality. You appear to be one of them.
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.