Agreed.

With this ending, they can either end Code Geass forever, or start a new season since doubts are flying through our thoughts.

Heck, I thought Cornelia died cause Schneizel used not a gun, but a machine gun to hit her.
Heck, I thought Suzaku died cause of teh explosion
Heck, I thought Nanully and the gang died cause of FLEIA
Heck, I thought Cornelia's knight died cause of FLEIA

Heck, Lelouch is alive.