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3. Arms of the Octopus
Both the Spider-Man and X-Men comic franchises underwent pretty drastic makeovers in 2013, and this three-part crossover between special issues of "All-New X-Men," "Superior Spider-Man Team-Up" and "Indestructible Hulk" showcased the all-new takes on the classic characters. The X-Men involved are time-displaced teenage versions of the original team rather than the characters readers have spent decades getting to know, and Doctor Octopus is actually in control of Spider-Man's body and life, having 'destroyed' Peter Parker's very identity. The arrogant and slightly evil Spider-Man has to work with the inexperienced X-Kids -- and one Hulk -- in order to prevent a mad tinkerer from wreaking havoc across the Marvel Universe in a story made all the more interesting by forcing Spidey into the role of mentor to the still-inexperienced heroes.