Some fan theories suggest a "darker" or more mature sequel where a 22-year-old Kenichi lives in the USA while Hattori undergoes advanced training in China to face a new threat called "The Fiery Wing".
Kenichi shares tempura with Hattori and Shinzo. Shishimaru drools. A small footnote reads: “No ninjas or stink bombs were permanently harmed in the making of this PureToon.” puretoons ninja hattori