Well, there's always the option of an open ended ending where they leave things out there for romance. Of course, the only ones that benefit from such a thing are Shirley and Kallen since I don't think it's viable to think C.C. could be there as well.
Bah whatver happens happens. You might be right or as you hope you might be wrong. Perhaps Cc and Lelouch previal perhaps not we would have to wait for the end to know the definitive answer. Have faith.