GIF's will be in the next version but it would be cool if you where able to control an image so you can make it move/stretch/transparent/rotate (using DirectX functions) so it's more resource friendly for some animations but I guess that would take more work to implement.
f.e.
- a light that fades in, stays on, fades out, stays off in a loop to create a broken TL lamp.
- Moving one or more images to create special effects like clouds or fire instead of a big GIF or APNG.
- A moving vehicle (f.e. a Jetplane), with APNG or GIF you would need an image as wide as the map and a lot of frames to make it look good/smooth but that would be very inefficient and would most likely create lag.