Was obvious what was going to happen...
also proof that no hand seal is needed for FTG.... see as how one hand is straight up missing and the other was in a fist bump position.
In that sense a FTG user can be completely arm and leg bound and still get away thus making the technique void-worthy in my book, but it is too late to go back. Of course the user has to have a marked point with their seal but that is easy.
I am waiting to see the two halves of Kyuubi fuse. Also wasn't Madara and Hashirama in the barrier when the attacks exploded and I think this further confirms that Hiruzen is very likely not coming back as well.