It was film, Sony 1080p, and Viper 2K. Info I pulled straight from WB MPI (who did the DI) for the list says they did the DI at 4K but that might be an error on their part though I couldn't find anything to confirm what resolution the DI was done at despite common sense suggesting 2K given the use of digital video for most of the movie.
The Viper was always an HD camera. There was never a "Viper 2K".