I do not know whether Sarri's offer will be accepted by CR7 or not because it is difficult in my opinion CR7 to be at the forefront because of the ball feeds of all CR7 who always contribute.
Ronaldo always love to play on the wing. He is good at making some flanks at good time going unnoticed and do skills. He is not suitable for a forward role at all. I mean the guy is good at finishing but he is best and suitable in left wing position only. Though it depends on him to accept. Doesn't Juventus have any forward other than Higuain to fill in while he is injured or maybe find someone else to play out of the usual position.