It looks like thanks to TFW2005 member daimchoc by the way of Weibo member HarryHuo, we have ourselves a look at what could be Transformers 4: Age of Extinction packaging. It looks like it is for a voyager or leader class size figure. There is Optimus Prime and a lot of Dinobot/Dinosaur imagery featured in the artwork design.
Based on what we see, it also looks like there will be at least four Dinobots, Grimlock being one, but at least three others. As a reminder, this doesn’t mean this will be the final look of the packaging, but does give us an idea of what we can expect. Check out the images mirrored below. (Source TFW2005)