New characters:
Cato Sicarius, Brother Vandius, the company banner bearer, Honoured Brother Gaius Prabian Apothecary Venatio

New squads:
Tactical Squad, Terminator Squad, Devastator Squad, Assault Squad, Bike Squad

Many units and vehicles:
Rhino, Dreadnought (Ultracius), Vindicator tank, Razorback tank, Land Raider Redeemer, Land Raider Crusader, Thunderfire cannons, Attack Bike, Land Speeder

A lot of recruitment options: wargear and upgrade options, command options, vehicle equipment and customisations

New rules (sheets)

1 campaign with 4 scenarios (sheets)