‘The idea is not to do four shows. The bar set so high that my hope is to get one show that lives up to it. Much as I might love the idea, HBO is not about to become the GAME OF THRONES network… but we could possibly see two or even three make it to the pilot stage, with one series emerging on air in 2019 or 2020, and the others maybe later, if they come out as well as we all hope.
‘Then again, maybe… but I should not speculate, you folks get WAY too excited. Truth is, no one knows. Least of all me."
A Song of Ice and Fire