from my limited experience Iron Fist is kinda like Mortal Kombat right? why not just do that?
There are different versions of Iron Fist.
There's the original white savior trope classic which was kinda racist and super dated, where white boy Rand returns to America to solve his parents' murder and reclaim his company. It's like American Ninja meets Batman Begins with a few slices of triple cheese pizza.
There's the version of Iron Fist that follows after that which is Heroes for Hire and he and Luke Cage are BFFs and they tag team various shit as Black Man and White Boy With Yellowface(mask). It's alright.
Then there's the modern reinvention of the character popularized by Brubaker and Fraction where is it basically Mortal Kombat. This is the version most modern fans of Iron Fist know and what they want to see.
What we're probably going to end up getting though, is a "homage" to the modern Iron Fist with tons of name drops, visual motifs, some character dynamics and villain concepts, but all watered down to a "grounded" and "street" version which involves gangs, mysterious corporations, and cage fighting.