I was thinking of a second instinct during which the character changes to a potential shadow version (skin,moveset)
Jago turning into Shadow Jago?
Shadow Jago turning into Shadow Jago???
ex. Shadow Jago turning into an Omen type skin or all the characters during shadow instinct curry their purple shadow. Endless shadow meter for some period could be. I m saying that intead of Ultimates (i like ultimates,no problem if we get) which are finishers, we could have some during-battle stuff extension.
I am thinking that characters could have more than one instincts, maybe 3, like Simple - Shadow - Killer instinct. I guess that this feature would need more life-bar battles but it could be great