It's a fairly big weekend for comic book fans. A little movie called Avengers: Age of Ultron kicks things off on Friday, with Free Comic Book Day following-up on Saturday.

Marvel Heroes 2015, the free-to-play massively multiplayer action RPG is getting in on the fun with a sizable content update themed around the soon-to-be-hit movie from Marvel Studios. The update, launching Thursday or Friday this week, includes the ability to play the entire game for free with one of the film's Avengers, plus the ability to play with the other five core members up to level ten. The Vision makes his debut, new costumes come into the game based on the film, and if you play the game as an Avenger, you get an XP boost for the entire month of May. Oh yeah, and there will also be hundreds of achievements added into the game!

But to help celebrate all this new content, and coinciding nicely with Saturday's Free Comic Book Day, Gazillion tells ComicBook.com exclusively that they will give away the Iron Man Mk 43 costume, fresh from Age of Ultron, to all users who login on Saturday May 2, 2015. Check out the armor here, and make sure you login on Saturday for the latest freebie!

And check out ComicBook.com again on Thursday for a sneak peek into the huge achievement list going into the game this week.