I think he could be convinced to take less money if it gave him a better venue for telling the story he wanted to. At some point the money becomes overtaken by wanting to secure legacy and doing what you want. TV offers two things the movies don't: more time and no ratings.
Kingdom of Heaven was actually a good film once the 40 minutes of cut footage was restored in the director's cut. It seems like he wants to tell longer, more complex stories these days, and the 2 hour movie format is holding him back.
And although Scott is one of the few directors that can get away with making R rated movies with top talent and budgets, even for him the pressure to edit to PG-13 must be enormous. Studios want maximum return on their investments, and the R rating is limiting. On TV, the opposite is encouraged: build your show toward adults to build audience and word of mouth. Put in lots of mature dialog, emotional drama, and violence and nudity. It has been a winning formula for a bunch of top rated shows.
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