DayZ 2 + Badlands · Live DLC
Frostline, then Badlands
Two expansions, one live game
Short answer
Frostline was Sakhal (cold). Badlands is Nasdara (hot). DayZ 2 is a sequel, later.
Also: dlc order · two expansions
What we know
Order of live DLC: Frostline shipped, Badlands is next. Different biomes, different meters. Neither is DayZ 2.
What to do
If you own Frostline, you already know expansions change the hour. Heat will be the opposite exam.
Don't
Don't call Badlands 'DayZ 2 early'.