They can't put enough MK characters on a release roster to please everyone. Even if they had like 35 characters people would find some niché character to get all hype about. But about Fujin. Fujin became a meme in MKX with people asking for him but I'm not sure he's very popular to be honest. That said, there's some good potential with his power set and design and I hope at least they have him in the story mode because with Dark Raiden this is a chance for Fujin to be more relevant then he has been in a decade. I really want to see Fujin comment on Raiden's change of personality after Shinnok.