As we learned earlier today , X-Men: Days of Future Past is now the highest grossing film of 2014 thus far - just beating out Captain America: The Winter Soldier. These are great times for the comic book movie franchise, and we couldn't be more pumped for the follow up. The problem is that we still have a long while to wait before we actually get to see it. While Marvel Studios is pumping out two movies a year and Warner Bros. is possibly working on three, we still have about two years left to wait until the next X-Men sequel, X-Men: Apocalypse . The anticipation may be killer, but the blockbuster sequel is still making its way through the development stage, as you can see in the image above.That embed you see above is the first photo ever posted on director Bryan Singer's Instagram account, and while it came without a descriptive caption, it's not hard to guess that this is the filmmaker's way of saying that they have finished working on the treatment for X-Men: Apocalypse. As you can see under the title, the story has been worked on not only by Singer, but also his team of writers including Simon Kinberg, Michael Dougherty and Dan Harris. If you're wondering why those names sound familiar, it's probably because you saw this Twitter post from the director's Twitter account late last year:So what can we actually gather from this segment of the treatment page? It would appear that X-Men: Apocalypse will begin set in Egypt in the aftermath of a long and bloody battle that has left many things smuldering and burning. Then perhaps before we even get to see adult Apocalypse for the first time, we get to see his minions: the Four Horsemen. In the comics, this group was made up of powerful mutants who had either been recruited or brainwashed to serve under Apocalypse's rule. The roster regularly changes, so we can't say who the Four Horsemen will be in the movie, but they will go by the names Death, Famine, Pestilence and War.While Bryan Singer is working on the script for X-Men: Apocalypse, it still remains unclear if he will be directing the film as well, as he is still dealing with the fallout from sexual abuse charges leveled against him earlier this year. It's been previously confirmed that the movie will be set in 1983 - approximately 20 years after the events in X-Men:First Class - and is expected to primarily focus on a cast that includes James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult. It has been previously said that the production is also looking to cast younger versions of characters we first met in the original X-Men trilogy as students at Xavier's School For Gifted Youngsters. Look for the film in theaters May 27, 2016.