According to this article and their source, "a relaunch of the Fairy Tail television anime project has been green-lit."
As I was typing this post, Hiro Mashima posted this on his Twitter...
... further confirming this news.
While the article mentions a 'relaunch' (?), Hiro Mashima calls it a 'sequel'. Shippuuden much? All that's left is to know when!