No.13422968 ViewReplyOriginalReport
This is how I suspect Rolo will kick the bucket:

As everyone in the Black Knights turns against him and aids Britannia, Lelouch and C.C attempt to escape to the Geass ruins(Or some place of Lelouch/C.C's past. Rolo in desperation of protecting his 'Nii-san' forces his Geass to stop everyone just short of the pair. Knowing 5 seconds wont be enough time for the two to get away he pushes himself on longer and after a few more seconds his heart doesn't start up and he falls over dead, his last few thoughts are of the only family he ever had.

Of course Emperor Wakamoto probably uses him as some cyborg zombie similar to Orange, which gives Ledouche a chance to use the bomb he's had a stiffy for.