Well I didn't mean to go at it defensively, I was just explaining. It's probably that NRS keep cock-teasing us by making him a cameo or including the sound files for him in MK9 or GAHHHHHHH.
Look at Tremor, he's had even less reason to be included but he's in because fans love him. I personally don't get why...
What we like about him, as I explained, is the potential he has as a wind god. He doesn't just send a draught through your window or manipulate your farts into someone else mouth, he literally creates tornadoes out of nothing and wields them as weapons. I mean tornadoes and hurricanes are fucking powerful, they destroy cities at a time and pass through places destroying everything in their path. Fujin just hasn't been explored to his fullest in-game yet which is frustrating considering he was supposed to be in MK9 and even has a cameo in MKX. It's a bloody cock-tease for us all.
I mean, being in one (two really, and in Armageddon they gave him a different weapon and revamped his look) game is still enough to start a fanbase. Whether he was introduced long ago or is introduced now is irrelevant since the same content, moveset, story etc is still there.
Kitana has one move that even remotely involves wind, that doesn't mean she does "wind stuff". She uses her fans in her moveset. Kitana doesn't create hurricanes, she throws fans or cuts with fans or...you get the idea: fans. Fujin is all wind - controlled tornadoes, funnels of wind (which you see in story mode), that Scythe-like staff he wields (in this timeline anyway) is his weapon. And he's a god, you can't go wrong with that. Just look up gameplay or his moves or his fatalities (which yes is limited because he's only been in two games but is still there lol) and you can see what he does. If he didn't bring anything new to the table he wouldn't have been included in the first place.
If you don't see it then I dunno but I've tried my best to explain...