They should try a book, maybe just a min-series, to see how it does. Then take it from there. No harm in that.
Today, I make no demands... no threats! But, one day, I shall voice demands -- and all shall obey them!
The crystals are alien technology, not ice and snow. He couldn't manipulate them if he wanted to.
I think maybe DC should release an Art of Mortal Kombat style book.
Reading Hyrule Historia made me think of this. It could be a way to test interest in a series.