Revenge of the Titans was a planned sequel to Wrath of the Titans, which in turn was a sequel to the 2010 remake of Clash of the Titans. This would have marked Revenge as the third in a series.
Plot
Unknown
Why It Was Cancelled
Both Clash and Wrath suffered from extremely bad reviews, with the latter performing rather poorly at the box office.
Result
The film was not made and was cancelled for good.