This is going to be about sage arts.
As we all know, you have to be still to use sage arts or have someone (the frogs) help you. We all know that the only way now for Naruto to use the sage arts to it's full potential is to summon the two elder frogs. So now, it is hard to say that one of the frogs will die since he needs them to use sage mode.
But what we all forgot is that he has another partner....The nine tailed fox demon. What if Naruto learns to use him, so that he can use sage mode without a frog.