In this case, Twitter surely will add a content management system that allows them to host full stories.
They'll pick the story up from "partner" sites. You may have to do some kind of cross-promotion to qualify. If you put their logo on your site, for example, they'll give your content a better look for people on Twitter.
The template is up to you. For now at least. Later there might be some requirements. An approval process, like the way Apple approves apps. A "sandbox." Yes there will be ads on the page. And a revenue-share. Maybe 60-40, like the app store?
Since China already has their own Twitter, your stories probably won't have to be approved by the Chinese censors. But who knows who else might have a say in what kind of content constitutes partnership.
Google will offer the same deal, but only if you don't partner with Twitter. Same with Twitter re Google.