With their films occupying the family-friendly demographic, the Marvel Cinematic Universe was looking to expand their tone to have more adult content. This need resulted in Marvel TV partnering with Netflix to create four original series that would crossover in a mini-series, where each show was more grounded, adult, and violent. Since the launch of Daredevil season one, this has proven to be a smart move from all parties - though the "grounded" Netflix corner of the MCU will become a bit more fantastical, when Iron Fist season one debuts in March.
Martial artist Danny Rand/Iron Fist's power set is by far the least grounded in reality of the Marvel/Netflix characters introduced so far, and there have been few signs that the Iron Fist TV show will be changing its namesake's origin and powers to be more "grounded", either. Previously, Marvel and Netflix have done the best they can to not make their individual Defenders TV shows overtly "comic-booky" by having the heroes parade around in noticeable costumes. However, Iron Fist may also break the mold in this respect, by having Danny don his classic superhero attire.
Finn Jones is playing Danny Rand in Iron Fist and was recently asked in an interview with Extra (via MCU Exchange) whether or not his character will get a comic book accurate suit on the TV series. Initially, Jones tries to play off the question as seeming far-fetched, but the way he ends his quote may have just confirmed that Rand will wear his classic comic book costume during the show, at some point:
I mean, who says there’s going to be a costume? I mean, this is a modern…. I can’t say any more. Marvel’s gonna kill me. There may be a costume, there may not be.
While this is not absolute confirmation that Jones will be wearing the deep cut green onesie and a yellow mask, there would be no reason for Marvel to kill him as he fears if he stated that there won't be a costume. Should Jones get the chance to wear the classic Iron Fist outfit, it will be interesting to see how closely it matches the source material. That said, expect the Iron Fist TV show to take some liberties in that respect, should it prove to be the case.
Marvel and Netflix have yet to indicate that Rand will be suiting up in his TV show, but may have given fans an idea of his costume with The Defenders photos that feature Danny in an open jacket to show off his chest tattoo. Iron Fist season one might also follow the same path as Daredevil season one and wait until its finale to see Danny get his proper costume; though hopefully, this time a picture won't leak ahead of time, as happened with Daredevil's freshman season. Either way, an appearance by the best-known Iron Fist costume in the TV adaptation would certainly come as welcome news to many a Marvel comic book fan.
Daredevil season 1 and 2, Jessica Jones season 1, and Luke Cage season 1 are now available on Netflix. Iron Fist will premiere on March 17. The Defenders and The Punisher will arrive at some point this year. Premiere dates for the newest seasons of Jessica Jones, Daredevil, and Luke Cage have not yet been revealed.