The Marvel multiverse is an eternally adaptable setting, a place where classic characters and concepts are easily reinvented with little concern for the ongoing adventures of the core Marvel Universe. As a result, creators have been able to use the title to explore truly wild concepts and completely reimagine old ideas. But some of the most memorable — and horrifying — issues of the series also highlight what makes those original core characters so appealing.
Source：https://www.cbr.com/marvel-comics-halloween-what-if-wolverine-vampire/
