I mean, it's a One Page Rules update. It's not going to be, "here's a single thing we've been working on." No. When they make an update, the throw the world at it. You have yourself three new armies. You have updated Campaign rules. Some Quickplay armies. And some looks at what they're coming out for models this month.
From the post:
In today’s update we’re bringing you three brand new fantasy armies, some changes to the campaign rules, a couple of quickplay armies, as well as previews for what models we’re going to be releasing in May.