Show-runner Glen Mazarra discusses what his plans were for the series. The article also contains a link to the full podcast, for those of you who may be interested.
Dark Tower Plans
I haven't listened to the full podcast, but here are my thoughts.
1) I was always cautious when I heard Amazon optioned the rights. Amazon is still a fledgling streaming service in my opinion, with not too many hit shows, unlike Netflix or HBO. I was always worried that we would get invested in a show that would be unceremoniously canceled.
2) The showrunner: Glen Mazzara. I'm just going based on his last work, which was The Omen TV series. It had some good moments but quickly went in the wrong direction. And yes, I know he was involved in the early years of The Walking Dead, but that's a show I got fed-up of for quite a while now.
3) I actually liked the idea of starting with Wizard and Glass and the backstory with young Roland, etc. They could do a decent 1 season adaptation of that book, setting up the rest of the series from the second season with The Gunslinger as we met him in the first novel.
4) Fun fact: Mazzara planned to have Stephen King (or an actor playing him) appear in the show, similar to the book!
I'm still holding out hope that HBO (or even Netflix) will go after this series.