Wells joined up with Naughty Dog back in August 2012, after a 13-year stint at Irrational Games. Within those two years were ten months working on The Last of Us. It's a strong possibility that Wells will assist in Giant Sparrow's latest project, first announced as Edith Finch, but then re-announced as "Unfinished Giant Sparrow Project." To quote the developers, "it's not a sequel to the Unfinished Swan, but it's not a million miles away either."
Until we hear from Naughty Dog on the matter, all I can say is - What the hell's going on over there?
Sources -- Wells' Twitter, Joystiq