On Eidos Montreal’s twitter page, they have finally told us what we already knew, Thief 4 is under development. The twitter post also had a link the the official Thief 4 forums.
No further details were revealed at this time, but we are going to assume it will be coming out on the PS 3, Xbox 360, and PC. With games such as Assassin’s Creed, Splinter Cell and other titles that Ubisoft has developed and publishded since Thief 3, I am keeping my fingers cross that
I hope we get a chance to see something from Thief 4 at E3.