Hm, I have a question, do you by any chance have the R2 vol.1 DVD/bluray insert booklet? There's a poster in the ep 23 thread claiming (also PMed me a while ago) that it contains some info regarding the "original" R2 plans, but I'd like to confirm it just to be sure.
I checked out the preview for episode 24. Looks like I was wrong. The Shinikirou wasn't destroyed. Seems it will even appear in the next episode.
Though it also looks like Kallen will confront Lelouch in the Guren. The extended preview I've seen shows her inside the Guren. She looks teared up as she's talking. I'm almost willing to bet that's when she's going to say her gum card line.