SEO is something one can’t do much about other than writing good content and working on to build some high quality backlinks. Google has previously banned people doing black hat seo. There have been many updates in recent past with panda and penguin getting most eyes and effecting over a few percent of websites.
Well this video is about What should we expect in the next few months in terms of SEO for Google? by Matt Cutts, and he tells more about upcoming changes and which people are going to suffer most in next update, but if your site has original content, you not need to worry about anything your site will be safe.
For a better and best view of upcoming changes in google algorithm, just watch the following video by Matt Cutts that will help you to improve your seo plans