Seems to be an ATL according to camels and it's easier to get into than the base Gloomhaven game. This is standalone and does not require the base game to play.
Gloomhaven: Jaws of the Lion is aimed at a more casual audience to get people into the gameplay more quickly. All of the hard-to-organize cardboard map tiles have been removed, and instead players will play on the scenario book itself, which features new artwork unique to each scenario.
The last barrier to entry — i.e., learning the game — has also been lowered through a simplified rule set and a five-scenario tutorial that will ease new players into the experience.
1 - 4 players
30 - 120 minute playtime
Ages 14+
Seems to be $67.99 now.