Via Anime News Network

In Otakon Vegas last Friday, novelist Kaworu Kurosaki AKA Kenshin Creator Nobuhiro Watsuki's wife is planning to start a Kenshin manga spinoff featuring the villains of the franchise, with her husband drawing the spinoffs. She got suggestions for Enishi and Shishio during her panel.

It'd be cool to know overall how the villains got to where they were before being the powerhouses Kenshin had to face!