I don't know how likely it is, but if it was going to happen, this seems like as good a place as any for something to occur since we know the series is supposed to hit a more global scale eventually. Considering the next episode preview has Lelouch taking his helmet off in broad daylight, I can only guess what that might mean and who might be watching. Yes, Suzaku is still holding onto the previous season's events, but I just don't see him being able to do anything if Lelouch and the Knights peacefully accept Nunnally's request. I don't doubt Lelouch is up to something here, but at the same time, this is his sister's request. I suppose I'm more hopeful than anything, so I guess we'll see.
Something else that came to mind is the fact that Nunnally is using her royal name but both she and Lelouch had been assumed dead since they were sent off to Japan. I don't know if it's going to end up mattering, but it would seem odd for a princess everyone thought died eight years before suddenly to pop up as the new governor of Area 11.