As far as I can tell, some guy in Georgia is putting Micro 4/3 mounting plates on a Senko CCTV lens and adding some engraving and a cool (but possibly reflective?) day-glo lime green retaining ring. And why not? Sounds like you could have fun with that. Not sure if all this is a fair appraisal or not (they haven't answered my email). Anyway, officially, it's the Noctor HyperPrime 50mm ƒ/0.95 for $750, shipping in...April. Not April 1st. April...well, 15th. Ah, let's just say "spring."
(Thanks to Iñaki)