Feel like helping Marvel Studios decide which Avengers: Age of Ultron art will be used as the official IMAX poster? There are currently four different options up to be judged, and they all make a good argument for being the one in movie halls across the U.S. I know which one I prefer, what about you?

The contest is taking entries from folks on Twitter, so head there if you want to participate. Simply find the one you like, and then Tweet out the hashtag that’s associated with each poster. There’s #UltronUnleashed, #AvengersUnite, #AvengersLastHope, and #UltronNoStrings. For me, it’s a tossup between #UltronUnleashed and #UltronNoStrings; I’m thinking #UltronUnleashed has the slight advantage.

Whichever poster you vote for, Marvel says moviegoers who see the film in IMAX will receive the winner on opening night, which is about a month away. Check out the posters in the gallery above, and let us know which one you’re voting for.

Avengers: Age of Ultron is set to hit theaters and IMAX on May 1.