Director Bryan Singer has been using his Twitter account to share the latest updates on X-Men: Days of Future Past with his fans, even confirming earlier this week that Ellen Page (Kitty Pryde), Anna Paquin (Rogue), and Shawn Ashmore (Iceman) have signed on to reprise their roles from previous sequels.

Today, the filmmaker has shared one of the immense set designs he is working on while in pre-production in Montreal. While he wouldn't specifically say which set this is, you can check it out below and speculate yourself.

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X-Men: Days of Future Past Pre-Production Set Design Photo