This is the original Japanese ending of Code Geass which shows the cart driver smiling after C.C makes her speech. The shape of his face and hairstyle look exactly like Lelouch's and the fact that he smiles at what C.C say's pretty much confirms it. This was however cut out of the Japanese version and never shown on the English dub. The writers wanted the viewers to decide what happens in the end so this takes away the imagination of the viewers leaving them with an answer. Code Geass R3 was confirmed but with different characters so Lelouch won't be there anyway. The point of showing him alive was probably to make the ending even happier because he managed to make everyone happy except for C.C who was trying to find love for over 200 years and finally did only to have him taken away. With this ending he wipes himself out of existence to make the world happy, but lives together in hiding with C.C with immortality.