Russian 5th generation stealth helicopter?

KA 50 (notice the rounded body compared to the KA 58 representations that show angled stealth designs)

KA 50 (compared to the old but very reliable Mi24 (Hind) Gunship)

KA 52 Alligator (has small mid-mounted wings, fitted with four underwing suspension units and wingtip countermeasures pods)

KA 52 Alligator (52 refers to twin aircrew version of the Alligator)

KA 58 Stealth?

The Russian military have been developing the twin counter rotating Kamov Ka 50, then the KA 52 and now on the drawing board is the stealth version the KA 58.  Notice in the actual aircraft and the representations on how the design is developing from a a single person attack helicopter to a twin air crew stealth aircraft.