Nothing major, but three additional characters - Lord of Plagues, Battle Wizard and Branchwych.
[url=http://www.blacklibrary.com/prod-home/apps/silver-tower-my-hero.html]As Baldrick's sign said, get it here[/url]
Oh, and for those wondering? I bought all the premium content in the early bundle deal - only one not auto updated this time was the Branchwych, which set me back £0.79, which is pretty reasonable.
Quite encouraging that they've added an all-new character from the Sylvaneth - means we can reasonably expect ongoing additions as factions are released.