I'll be watching for sales too.
However, I've only played (and hated) a little bit of Arkham City. I'm not a massive fan of Batman anyway and IIRC the controls were a bit awkward/weird.
It sounds like I may enjoy this, though...
I've had problems with them.
They're the ones that sent me a Titanfall key that turned out to be in Russian.
They later sent hacking instructions, but was told every time TF updated I was expected to re-hack it and there was a high chance it would fail.