Emergent Games has made public the type of maps that will be available both in the core game and the expansions:
Core Set: - Forest - Outdoor
- Town/Village - Outdoor
- Mine/Underground - Indoor
- Building/Complex - Indoor
Africa Expansion: - Desert Ruins - Outdoor
- Experimental Lab - Indoor
Europe Expansion: - Winter Bombed-out City - Outdoor
- Occult Ritual site/Mansion - Indoor
The multi-squad missions have two arena/huge area battlefields, plus you will add 4 tiles from the core set to create a 2x8 monster board. There are two Multi-Squad packs, so that's 4 arenas total.
Apart from that, they have added one mission pack and one final boss to the addons:
Challenge Mission Pack:
New Boss:
And, last but no least important, they've added a new Pledge level and updated the Heavy Assault level!:
Recruit Plus:
Heavy Assault: