Im going to be the first to say : I hate the word canon. It sounds so stupid to me .... with that being said, I want Sindel's to be the legitimate ending.
What's cannon? (Noobie me )
I'd like Liu Kang to become a god so Shang Tsung can kill him and we'll have a new chosen one
Liu Kang's ending should be cannon, I want him to be the sub-boss of MK10. He gets resurrected by the elder gods, convinces them to make him a god to protect Earthrealm, but turns evil, because of his hatred towards Raiden.
Just like Ryu will never turn evil
I'm not saying I want Liu Kang to stay evil forever, he'll be brainwashed by Quan Chi and Shinnok into betraying Raiden. Not to mention that I like to play with the bad guys, so I'll pick him more often.