Unless Cruz beats Trump by a landslide in every remaining primary, which won't happen, Cruz won't be running against Hillary. The "best" Cruz can do is deny Trump the 1237 delegates he needs and force a brokered convention. Once that's accomplished, the GOP gives Cruz a polite "thank you ma'am" and tosses him aside to nominate one their own candidates of choice: Mitt, Yeb!, Marco, etc.
I am starting to believe the hope will go with Cruz. He has shown them he can be controlled.