The Filth expansion features a fan favorite faction making its debut in Summoner Wars 2E. They are a band of cultists, led by The Demagogue, that become mutants that spew poison on everything in sight. Alongside this expansion, The Chosen Grove will also be released. This expansion introduces a brand-new faction led by Summoner Eldrid Nimid. This sacred tree leads a band of forest-dwelling warriors that are looking to Uproot their enemies.

Plaid Hat Games also released its next Ashes Reborn: Red Rains expansion, Siege of Lordswall (see "'Ashes Reborn: Red Rains' Expansion").