If Wu Lae were to be in the game, I would much rather have him fight with his scythe than have any elemental based powers. It would provide him some uniqueness from the other ninjas that rely on some element for their attacks.
Have Wu Lae use his scythe like a hook by having him have some anti-air grab where he is able to catch people in the air and pull them down to him. Or have him reach out in front with the scythe and pull the opponent close. Either grab can branch into four different moves depending on which attack button is pressed. One move can be a launcher to set up a juggle, another could push the opponent away to reset the space. That way they function a bit like Liu Kang's butterfly kick special in MK vs DC. If projectiles get in the way, he could probably have some projectile slice move where he dashes forward and slices the projectile, completely nullifying it, the EX version could have him actually gain a damage boost from breaking the projectile or something.
I know some may not care for the scythe, but that was Wu Lae's defining trait, that he was wielding a weapon instead of an element, and therefor that should be the focus of his character if that were to happen.