If you would have the rights for doing the prerenders, its still no. You would have to include both project file in the same item. But you still cant use element 3d as a prerendered item.
Your christmas title was rejected because old school and bad camera moves! Improve your skills! its 2014 now. look at nowadays designs.
lol. whats going on with these old topic recovers.
I upload full hd previews since march. Didnt got rejected for that.