As of right now, there are achievements for completing both Heroic and Mythic dungeons for The War Within.
War Within Dungeon Hero Achievement
This achievement requires you to clear all War Within dungeons on Heroic difficulty. It rewards the Battle Pet Moss Skipper - A pet with the exact same appearance as Bubbles, the iconic Operation: Floodgate NPC!
Glory of the War Within Hero Achievement
This achievement requires you to clear all War Within dungeons on Mythic difficulty.
As of note, unlike previous expansions' Glory of the Hero achievement, this achievement has no actual dungeon achievements (besides the Mythic difficulty completion requirements), and gives no rewards (whereas previous achievements reward mounts). It is unknown if this is the final version.
Glory of the War Within Hero
