According to a much more trusted website, Screen Rant got a quote directly from Michael Fassbender this week confirming that he is still on board Assassin's Creed.  This is great news!

http://screenrant.com/assassins-creed-movie-michael-fassbender-interview/comment-page-1/

 “I love these rumors! It’s fantastic. People talk about it, and they’re hopefully interested. Nothing has changed, yeah. I’m still a part of Assassin’s Creed, and we’re working on the script as we speak. Actually, I’m going to go back and see the writers when I get back to Europe.”