Thanks to one of 25 magazine covers from Empire, we got our first look at what the future Sentinels will look like in Bryan Singer's X-Men: Days of Future Past. We now have a few more details on the future Sentinel and what the makers were going for when it was designed. The following information comes from production designer John Myhre:
They're biomechanical weapons. We had to come up with what would be the ultimate version that could actually, in principle, stop the X-Men. We started with this idea that they were almost made up of magnetic plates slapped over one another, imagining that the plates could contract or grow, so the Sentinel can be skinny to get through a small space or the plates can open up to become a bigger shape. So they have become virtually unstoppable.
I can't wait to see these Sentinels in action! We'll be able to see it on May 23rd, or maybe, just maybe, they'll throw it in an upcoming trailer!