I feel like having Code Geass R3 is quite a big risk, considering how R2 ended, but one thing that could be a problem is whether the original ending was shown or not, because when I watched it, I saw the original ending, but when all of my friends watched it, they all saw a changed ending. This could cause confusion seeing as the changed ending makes it seem impossible for R3 to happen, whereas those who saw R2 would understand how R3 is possible. But even then, adding R3 is quite a risk as they finished R2 almost perfectly, so continuing it gives it the potential of taking a turn for the worst, but hopefully, that's not going to happen. ^-^