Who said anything about blowing it up?
If you think Isaiah is going to be fine with coming off the bench for a much younger player you're buggin.
He didn't like coming off the bench for Smart and that was before the all-star games, any type of playoff success, commercials, etc.
But at this point, I think you just have to cross that bridge when you get there. And there's still a chance that those two can co-exist in the backcourt together so it won't come to that.