Green Lantern writer hired for Green Lantern 2 and The Flash?

I was reading this at /Slashfilm and really didn't know what to think. Sooo, Warner Brothers is loving Green Lantern (1), so much, they're starting part 2? Wowzers. I am impressed. WB hired Greg Berlanti, Michael Green, and Marc Guggenheim to start writing Green Lanter 2 as well as The Flash.

So we knew that WB was green lighting superhero movies left and right. We knew that. But we didn't know it was going to happen so fast. I've told you my thoughts on the superhero movies WB has lined up. I've also told you who I think should play these characters, now it's up to the studio to cast them correctly! Let the writing begin!