Erin Hunter has recently announced that a movie of Warriors is going to be made!
And it's for real, this time. Copypaste this link, take a look at the homepage, and find out for yourself! http://warriorcats.com/
If you really want some more information, copypaste THIS link: http://variety.com/2016/film/asia/alibaba-pictures-film-rights-warring-cats-book-series-warriors-1201895983/
I'm pretty sure they're starting with Into the Wild (well, you'd think they would, it's the first book) and make their way through. Hopefully they even manage to do the whole first series! (Books 1-6, The Prophecies Begin.)
Alibaba Pictures wants to make a movie of Warriors with the Erins, and it's almost certain that Erin has agreed! She left a message on the Warriors homepage (you will have seen it if you copypasted the first link) saying:
"We are excited and delighted to announce that Alibaba Pictures want to make a film of Warriors! We have nothing more to say right now but we are sure we will have more to tell you in the months ahead!"
PS: Please only add projects about the Warriors movie. Also, please ask me first before adding them! Thank you!