One thing that immediately stands out about these posters is the emphasis on Wolverine, who only had a brief cameo in X-Men: First Class but more or less takes center stage in X-Men: Days of Future Past as the vessel for a message across time. Wolverine remains the only mutant to have starred in his own series of standalone movies, so it makes sense that he would be, quite literally, the poster child for what is the most expensive X-Men installment yet (and one of the costliest superhero movies to date in general).