For me only a few assets are needed. like some common house furniture, lamps,closets. 1 or 2 models of a plane (for example for making a hangar for instance)some more things to work with. i definitively buy that dlc if it comes available.You could make some dlc packs with items of the same genre.For exemaple the household pack (house furnitures), disco pack (disco models, mirror balls), military pack (military models, planes, boats, ships, etc)monster pack ( some rigged monsters that are animated or to be animated),some animation editor, that we could make an inanimated model to be animated).a texture editor pack dlc.The engine is very good and awesome as is.This sugestions are to make it powerfull and super awesome.And this suggestions are some of the things i'd like to see in the future .