Well at least I can understand Takatsugi's vendetta against Gintoki. Honestly didn't really see that coming, that's pretty depressing. I suppose there was some foreshadowing back in the Red Spider Arc, it makes a lot of sense now.
Also, I really hope this arc doesn't mean Gintama is ending. I can't handle that shit right now, this is one of the few series that I await every week.