Despite the fact I generally prefer more grounded stories for the Bat books, Zdarsky writes an entertaining story. Only on the surface though.
Because when you think about it:
1. We're getting a take over of Gotham yet again (which is boring in itself) following the Bane, Joker and Scarecrow arcs we got over the last few years; and
2. It does not make sense (from a story/in-universe perspective) that Bruce will design something that will be able to take down the entire Leauge. I mean considering the "need" for Failsafe stemmed from the Tower of Babel fiasco, and the subsequent conversation with Superman (last issue), it just defeats the entire purpose.
In effect, Bruce simply designed another "him" and we're back to square one.
**As others have pointed out, seems Bruce makes better villains than his Rogues Gallery. Begs the question why he just doesn't launch Failsafe against Joker and Co...
Guess the simple answer is DC needs to sell books.