This is a must have expansion for Marvel Legendary owners. This is a big box expansion that adds a lot of elements to the base game rather than the usual small box expansions. Not only does it add some new abilities, but quite a few of the characters are great additions. Love the X-Force characters as their abilities really add a lot to the heroes. Marvel Knights I found so-so. Apocalypse is the best villain in this expansion and he's a tough one. Great, great buy.