@DCW Mark Millar pretty much confirmed that there will be Sentinels in this one. I know Millar is known to exaggerate but he knows this is one instance where he can't hide from a quote of his.
Here's what Millar told SFX Magazine:
"...going for a big sci-fi style thing with X-Men: Days of Future Past. It's X-Men meets The Terminator. You've got robots, you've got time travel, you've got superheroes - it's got everything in one film."