That's what's happening in the Test of Honour: Dojo Assault set. Warlord Games is taking pre-orders for it now.
From the post:
The renowned sword-master Kazmiizumi-kanchou stands to protect his home and legacy against a wave of deadly and skilled Ninja!
The Ninja have come fully prepared for dealing with this tenacious adversary. Armed with ninjato, kamas, sais, throwing knives, tekko-kagi, even shuriken and a grappling hook! They’ll do anything to achieve their goal…
Capture that iconic movie scene with this quick and easy bundle, it contains:
1 MDF Dojo, fully detailed with moveable doors and removable roof.
1 metal Samurai sword-master Kazmiizumi-kanchou.
7 Metal Ninja armed with various weaponry.
1 rules expansion booklet – Darkness & Deceit
Gameplay cards for the Teacher and Ninja
2 MDF Lanterns.
1 Sword Measuring device.