I can't be enthusiastic about the possibility of Butcher following GRRM's path in getting involved with TV/movie adaptations. With 5 or so years between publishing Dresden books since 2015 and with, what, 7 more to go after Twelve Months is scheduled to be released in January 2026, I'd much, much wish that he focus on finishing Dresden.
Or he can also get a co-writer and start pumping Dresden books out every 12-24 months like he did through Skin Game.
Even then, the Dresden files wouldn't likely be done for 10 more years.