Thanks to the Internet, it was spotted that a couple of Naughty Dog employees may already be working on The Last of Us 2. The current Linkedin profile for Michael Knowland, a former Lead Character Artist at Naughty Dog, notes that he worked on various head sculpts for The Last of Us 2.

Another Linkedin profile for Frank Tzeng, a Lead Character Artist at Naught Dog, mentions that he's working on both Uncharted 4 and an "unannounced AAA game." Hmm, could that also be The Last of Us 2? Maybe. Nothing has been announced by Naughty Dog yet. There is no doubt that with Uncharted 4 slated to arrive in 2015, most of the studio is mainly going to be focused on that game first and foremost.