It's probably misdirection, but all signs in this particular video point to Jericho. As you'll see, the overabundance of m's gives it away:
So, gather here and listen as the dire boy’s voice forebodes and haunts...what’s he saying?
“Come my people and shut thy doors about thee. For a power shall come to punish the meek for their inequity. For on the second day of 2012, a familiar force shall arrive to claim what is his and it will be the end of the world as you know it.”
And just then the sinister text appears: It Begins.
Who is (loosely) using the apocalyptic 20th and 21st verses of the twenty-sixth chapter of the book of Isaiah to announce his return. That wasn't a question, by the way. See?
No, seriously, folks.
Be prepared, all, for the coming of the Lord (of inferior dance)... The Bad Mamma Jamma... The Best In The World At What He Does (video riddles?).
I might be missing some kind of hilarious joke here (it's been a long week and I'm sleepy), but I'd suggest that discounting former wrestlers, the vast majority of Raw guest hosts are more famous than Jonah Hill. At the very least, your list is missing Bob Barker, Mike Tyson, The Muppets, ZZ Top, Floyd Mayweather, Al Sharpton, The Osbournes, William Shatner, Jerry Springer, Pete Rose, Cheech & Chong, Buzz Aldrin, Flava Flav, Toby Keith, Pee Wee Herman, Criss Angel, Rob Zombie, Wayne Brady, Jon Lovitz, Jewel, Jon Heder, Timbaland, Pitbull, Ben Roethlisberger, Verne Troyer, Dennis Miller, Cedric The Entertainer, and David Hasselhoff.
But I might be biased because I really really hate Jonah Hill.
Did anybody notice Jericho's claim that he - as everybody knows - had a cold or the flu at his WrestleMania match with HHH? This was the reason for him losing the title.
Jericho is absolutely the main reason for watching SmackDown (and Angle)