"X-Men: DOFP: 2 Photos--Sentinels & Swift Kicks

"X-Men: Days of Future Past" director Bryan Singer took to his Twitter account to post two related photos:

In the first we see a full body suit of one of the Sentinels--mutant-hunting robots--created by Bolivar Trask (Peter Dinklage) to scale next to Singer.

The second is a pic of Mystique kicking some butt:

Singer recently clarified to Empire just where the upcoming film fits in the timeline of the series

"It takes place about ten years, give or take, after X-Men 3; and in the past it takes place about ten years after First Class. I'd say it's not a sequel to one of the others. It's an inbetwequel — that’s what I call it, for lack of a better word."

The sequel is based on a -2 issue story arc in the 'X-Men' comics published in 1981. Kinberg (Sherlock Holmes) is on board to pen the screenplay which will include New Mutants. Magneto and his relationship with Charles X. Xavier will be front and center as well.

Singer penned the treatment and produced 'First Class' which was directed by Matthew Vaughn. Now, their roles will be completely reversed for this sequel with Singer helming the film while Vaughn wrote the treatment and will produce with Lauren Shuler Donner and writer Simon Kinberg

Most of “X-Men: First Class” cast will reprise their roles, including James McAvoy (Professor X), Michael Fassbender (Magneto) Jennifer Lawrence (Mystique), and Nicholas Hoult (Beast). Lucas Till (Alex “Havoc” Summers) Rose Byrne (Moira MacTaggert) recently confirmed that she is NOT in this film...

The original trilogy stars Sir Ian McKellen Sir Patrick Stewart and Hugh Jackman are already poised to return again as well. Anna Paquin (Rogue), Ellen Page (Kitty Pride) and Shawn Ashmore (Iceman)Halle Berry (Storm) While it was hoped that James Marsden (Cyclops) would be back. It seems Alan Cumming.(Nightcrawler) will not return.

Daniel Cudmore is returning as Colossus and BooBoo Stewart is also in the film--character as yet unknown. Chinese actress Fan Bingbing has joined the film--as Blink, a mutant with the power of teleportation. American Horror Story favorite Evan Peters will portray Quicksilver Aussie soap "Home and Away" actor Josh Helman -- once rumored to be playing a young Cyclops -- will portray Bill Stryker. In X2: X-Men United Brian Cox played him and in X-Men Origins: Wolverine Danny Huston took over. French actor Omar Sy plays Bishop and Adan Canto also star.

Production on the sequel is well underway "X-Men: Days Of Future Past" hits screens May 23, 2014.