concept super dutys??

I live in Flint Mi and in prob just the last week i have seen 5 or 6 what appear to be super dutys, they look like a super duty from the rear end of the truck but the whole front clip is coverd in that lebra type shit that covers up everything up front so u cant tell what it looks like. my question is, are there supposed to be some new style super dutys coming out soon??? or are these prob just experimental..i have my camera phone handy next time and ill snap some pics..