I'm sure you all know what I'm talking about. Jade only exists to further Kitana's storyline. Nightwolf's presence in MKD is completely irrelevant. Li Mei will never defeat the final boss, and Hotaru will never lead an invasion of the Earth.
Is it too much to ask that each character in the game actually has the potential to alter the storyline or make a lick of difference, instead of basically having the final boss, the Earthrealm heroes, and Raiden as the only characters that mean anything in any given game. I'm tired of b-plot storylines that have characters like Nitara, Reptile and Cyrax hunting for arbitrary orbs just to give them a reason to even be in the game. I'm sick of characters like Tanya whose endings are always farfetched and never canon.
It can't be that hard.