Wasn't there talk of a Haswell refresh? Z68 and Z77 were the same socket, but they still released newer chipsets. It'd make sense for them to end the cycle at 9-series though, which seems quite meticulous of Intel.
I have 8 Akasa Apaches running off 2 separate PWM splitters and it's a great setup. Get the Gelid fans though because these Apaches have a fair bit of motor noise.. I'm thinking of replacing my fans with Gelid Silents.