Everyone hates cancer. Everyone loves Will Ferrell. And a whole lot of people love video games. What happens when the three combine? You and Will put together a raiding clan and cast magic missile on cancer, or something.
Even if you aren't an elite haxor that once sniped the entire team by camping in that one spot everyone knows but doesn't use because it's "for noobs," there is still a great chance to engage with a cool campaign that includes a chance to hang out with Will freaking Ferrell!