My concern here is that it could block important content.
Take CNN’s implementation for example: http://www.cnn.com/2015/08/10/politics/lil-b-based-god-black-lives-matter-clinton-sanders/index.html
The buttons block pictures, text, and other content here.
If done right I could see this being a great feature (as long as it could be turned off) on many communities. Maybe do it a little smarter - instead of just a “next” story use data like recent search history, categories viewed, etc. to provide a “Smart” topic that would be more likely to get a click from the user.