It was announced a while ago and a lot of folk were pretty unhappy about it basically because 'they already bought it for Arma 3'.
Also, everyone wants Namalsk and Taviana as they have different assets, buildings, vibe etc whereas this one uses mostly the same buildings and terrain as Chernarus.
I'll be picking it up, a new map is a new map after all.
There are other maps out there in modland, DayZ RP have an map, Hunter Island, but I haven't tried it out.
DayZ has gotten quite popular again lately, just wish they'd add bikes and helicopters because I'm tired of moaning about it.