You can render high res stills using the Supershot plugin. I know the BodyLanguage suite does speech and thought bubbles. I don't know other plugins that do speech bubbles. These could always be added in post. With BodyLanguage, it's fairly easy to set up and save a lot of poses, even if you don't care about the automated motions. The forces can be disabled, if all you're doing is rendering stills. Once you have your stills, combine them into a PDF, that's what several others do, like
@Falis