Ryu Hayabusa vs Hayate
Ryu Hayabusa and Kasumi are engaged.
Eventhough this calls for a celebration, there is much concern, mainly because of a loophole in the Mugen Tenshin laws in which since Ryu is now a member of the clan by marriage, then Kasumi would not only be reinstated back into the clan, but can be allowed to return to the Mugen Tenshin village.
After listening to the Hajinmon sect's grievances - mainly Ayane's - Hayate comes forward with a solution. For some time, he had long wished to test Hayabusa in combat and issues an open challenge to his prospective brother-in-law.
Should Hayabusa win, then all is forgiven and Kasumi will be given a pardon from all offenses. If Hayate win, then Kasumi will still be pardoned, but can't return to the village, nor to the clan.
This is a straight-up ninja match. Ninpo, weapons and everything else is enabled.