For starters you're assuming that they're gonna actually add new content, which lets be honest, in the video game industry is a terrible assumption to make. When has a game ever exceeded your expectations in terms of options and content? I'm gonna guess never.
Secondly, the idea that Taleworlds could adhere to a schedule is laughable. Even if they do add a ton of new content they've shown themselves to be terrible planners and simply awful at managing time. What relam10 said is right, soon (late) is all you need to know.