Cutscenes that can be played before, during, and after
levels. Nothing overly elaborate. Using the engine to
generate them. I don't believe playing MPEGs, AVIs
etc... is required as they are often too large and I don't
believe anyone has the proper equipment to generate
worthwhile clips. Maybe the ability to have dialogue,
either by voice or writing at the bottom of screen. More
for TCs then for Doom projects.