Two things can't happen in the upcoming episodes.
1. Amagai can't survive.
2. Yamamoto can't attack.
Why?
For 1, Amagai is a filler character, he can't interfere in anyway whatsoever with the plot of the anime without deviating from the actual plot.
For 2, Yamamoto has yet to in the manga or the anime attack anyone farther than his scene with Ukitake and Shunsui in the Soul Society arc. No one knows how he fights, so they can't go any farther than that without causing problems.
So, I already know, to a degree, the turn out of the next several episodes of this arc.