@Billy
The DiCaprio article is two years old. Don't think that show is still up for production anymore.
Same as the Wahlberg-Cocaine Cowboys movie that was going to be a series. They own the story rights and have the project ready to make, but are not finding production for them.
I'm afraid you're right. This happens very often unfortunately..
They are also talking about a new tv show about the mob from Amazon with DeNiro and Julianne Moore. Will also probably never come to fruition.
http://deadline.com/2016/11/david-o-russ...any-1201849861/
