Vin Diesel has released a video where the actor lets it be known that the Riddick DVD is currently #1 on the same charts as well as that Universal is ready to develop a sequel.
Check out the video of Vin Diesel that he released on Facebook where he mentions the Riddick sequel (at about the 3:10 mark).
I'm just excited and happy, and I'm shouting out to you guys to say thank you. Universal just called me and told me Riddick is number one on the DVD charts. There's no way Riddick would have been made without you guys. You know that. And you guys have been a part of our page since 2012, and remember how arduous a road it was to get the movie made, and to make it rated-R, and to do it with such a low budget. It's a win for all of us and I really really thank you so much. Yeah, I'm excited. And of course, Universal is also saying they want to develop the next one!