The corona-modified "roadmap" for the next little bit in Underworlds has been shared with us:
https://www.warhammer-community.com/202 ... BCemRGz2GY
Most notably, the two new warbands will drop in August, and season 4 has been pushed back to December - a totally reasonable move, IMO.
There's also a solo gameplay mode, against a Fomoroid Crusher (or other large model in your collection, but any excuse to buy a Fomoroid Crusher, really) that follows some simple "AI" scripts. I'll probably give it a shot.
In September there'll be a multiplayer expansion, which could be interesting - multiplayer games have always been a (surprisingly, when you think about it, for a game designed primarily around two-player play) fun way to play, but more game modes and a "balance pass" couldn't hurt.