I much prefer Joss have a blank canvas to work on, rather than feel tied down to decades of material. This is the best way to go, as far as I'm concerned.
1989 - "That Batman movie was pretty good. I wish we had more comic movies..."
2015 - "Aunt May is too young, Aquaman isn't blonde, Apocalypse looks purple, and ALL THESE ACTORS ARE TOO SHORT! HOW COULD THEY DO THIS TO MEEEEE?!?"