Sareena mentioned Bi-Han in the story but it was about before he died.

He's only mentioned a few times in dialogues between Scorpion and Sub, and Sareena and Kitana.

All about him before his original death though

Whaaaaaaat?

Wouldn't be surprised if he ever became DLC.

It's so strange to hear and see nothing of him, yes he is my fav charcater but he is a very popular charcater in general and has to be the biggest character to not even get a real mention yet it is quite strange. Fingers crossed he is either a super super secret unlockable (highly unlikely) or future DLC but I doubt this as well probably won't be seen till next game now

Outside of what's been posted,nothing. Boon teases him,so hell if I know if he's going to be included in MKX. Maybe the several mentions towards him may mean he's future DLC? IDK. Shang Tsung is another character that's been mentioned A LOT,in endings,story mode + bios. He's also the only MK1 character not to be in MKX as a playable character.
Wouldn't be surprised if he's DLC.