Gotham Knights will not support four-player co-op

The Bat Family only works in pairs, apparently.

Gotham Knights Leak May Hint at 4-Player Co-Op

How does co-op in Gotham Knights work? - Explosion Network

Gotham Knights will get a new 4-player co-op mode after launch

New Batman Gotham Knights game: Everything you need to know

Gotham Knights Is Getting A Free Four-Player Co-Op Mode A Month After Launch - GameSpot

What to know about Gotham Knights crossplay and multiplayer - Polygon

Gotham Knights Announces FREE 4 Player Co Op DLC!

It looks like Gotham Knights will feature four player co-op

Gotham Knights Co-op May Have Been Bumped up to Support 4 Players

Does Gotham Knights Have a Co-op Split-Screen? Answered

Gotham Knights: How to Play Co-Op

Gotham Knights Is Set To Get A Free Four-Player Co-Op Mode In November

Gotham Knights co-op upped to four players in new game mode

How to play Heroic Assault, Gotham Knights 4-player coop mode

Gotham Knights review – a promising spin-off that wilts in Batman's shadow, Games