I hope so.
If support vr180 & 360 photo will be better
We will definitely add support for picture later but we don't have a ETA yet.
Right now we are occupied with the support to ~8k playback solution.
On the current version, if you add .mp4 after the picture filename, then SKYBOX would read the picture file.
For example: picture.png.mp4
Please notice that you need to change the loop otpion first so that SKYBOX does not automatically play the next file in the list.
(Advanced Setting > Play Adjust > click "Loop List" two times then "No Loop" would appear)
Cheers.