I think this was discussed earlier on the forums. I don't know about assets,(models and such) but porting the game (if I recall correctly) would require devs to code it again since unreal 4 doesn't support the unreal 3's scripting language.
That was an awesome match. I didn't realize someone was taking screens until now.
I was just casually giving you a gunner job and then suddenly, a gunner visceroid was born.