HTOTM: FUSION
Iaijutsu

Classic, but only 20 frames long, with 2 frame rounds, possibly only 10 seconds of reaction time. I haven't playtested it yet, just had the idea. It'll force you to have a solid opener, and contingencies in case you see that it's going to be beaten. Boring as piss to watch, I'm sure, but a hell of a lot of strategy involved.