It existed for a little while on a few sites, but probably that was when Samsung decided to pause with the NX production. Mini camera's form factor is very close to mobile phones anyway, I do not see a future for those.
Hi. I know you posted this a long time ago and probably do not check this site. Yes, the NX Mini2 does exist. I have just obtained a brand new copy. It has been totally re-engineered and redesigned. It has the specifications posted online, plus Bluetooth. It also features remote control. It is a beautiful thing.
The Nikon 1 Series cameras are a nice alternative to the Samsung Mini 1 or 2. But I'll still be looking for a Samsung Mini 2. The 1J5 from Nikon is a vary capable 1" sensor camera, and you can usually find them at reasonable prices.
Working prototypes and marketing material do exist, but it never went for sale. I’ve only seen one owned by some random guy either here or on oldphoto forums.