AKG is going to make a new version of the 451. No teeny threads on the capsule. I think they will be non-removable capsules, cardioid only (BOO).

The electronics are descended from the AKG Blue Line, and there will be 2 low cuts, and a 2 position attenuator, unlike the screw-in capacitive pads that Stephen Paul says messed up the frequency response on original 451's.

This was supposed to be introduced at AES.

If I told you how I found out about this I'd have to.