The weird thing is that heat was a remake, of an earlier not very good Mann piece (karate kick through the window aside

)
With heat, he somehow refined and improved the idea into something far greater and epic than what came before. A better cast and larger budget clearly also helped. But the story, location and characters are what brought the magic. In my opinion
The book although had some good set pieces in it. But it felt hollow and small. Especially when compared to the great character work in heat. Like a fan fiction of what came next and before. (Another Han solo got his name moment, was my thoughts


)
The book wasn't terrible. But a few fan moments/winks and some pretty decent sounding action beats aside. It could be a struggle to get a movie version to even sit close to how mind blowing heat is. The best I would think it somehow Mann does another la takedown, to heat transformation. But to be honest. I can't really see lightning striking twice (I can hope, I guess. 'Does ronin at the start of endgame teary pose'

)
Maybe one just to leave as a book. Truly call heat a one and done (why mess with greatness ?)
I could suggest a proper type (no streamer) mini series, starting with the heat story and going from there. They could spring back and forth in time to tell the whole thing, over maybe 2 or 3 series. Mann has form for that sort thing

. As the book had a lot going on, with at least 3 parallel stories going at the same time (the cop, the gangs history and the current/future story)