Writing a Blade script isn't difficult, unless you're trying to cram in a bunch of woke DEI girlboss shit, and fuck, even the third shitty Blade movie had some girlbossing with Jessica Beil which wasn't too bad (because she was hot and not a bitch).
Act 1: Blade is a badass who looks cool as fuck as he kills a shit ton of vampires.
Act 2: Blade discovers with the help of side character that local vampire asshole has evil plan to do evil shit, make super vamps or convert a bunch or orphans or whatever heinous shit. Doesn't really matter as long as its evil and plausable.
Act 3: Blade stops the evil villain vampire and his asshole plans by being a total badass, optional sacrificial heroism of side character to help Blade get his sword back or whatever. Blade says some shit about the job not being done, always more bad vampires to kill.
Done. Hire some of the guys that did the Raid or Dredd to film all the action scenes, get some trainers to inject your nigger lead with steroids, and find some hot chicks that don't mind wearing nothing but fake blood. Sleep on a bed of money.