Having experienced the phenomena several times at altitude (2 bladed system, counterclockwise) what is going to happen after you have reach the limit of the retreating blade is, the aircraft will get a high frequency vibration (seemed like) and right after that (if acceleration is maintained) the aircraft will pitch up and start rolling to the right.
It is not a violent maneuver when it happens but it will pitch up to about a 45 deg nose up and also roll to about 45 deg. The recovery from that is very simple, do nothing. The pitch up will kill some of the forward speed, the aircraft will roll back level and the nose will come down, simultaneously. It will go right back to where it was before the stall if you don't interfere with it.
JD