From previous years, no, you can't submit 3D art, but you can trace it or vectorize it to make it 2D.
@Background Pony #0F4C
I personally doubt that too many artists who were interested in the community collab left. But I'm not gonna lie, I'm interested to see how this year pans out and what the scale will be this time, as it is a mystery to me as much as it is to everyone else.
Derpibooru costs over $25 a day to operate - help support us financially!