Impel Down will be freed by RA.
That whats Level 5.5 was made, Ivankov planned the escape for the right time (which wasn't back then).
Now Bon-Chan is in the lead of lvl 5.5!
RA will most likely use the Morley for the Break Out, Morley was also the one who created lvl 5.5.
I highly doubt that Mihawk and Croc are going to attack ID.