I'm completely sold on Brock Lesnar winning this match, however, I just want to address a few things.
The argument that the HIAC is just a cage with a roof is fucking ridiculous and to those of you that have used this argument, you're grasping at straws. The HIAC and cage matches of Hogan's era are completely different match types. In Hogan's era, to win a cage match, one had to escape. In the HIAC Hogan can't escape for a victory, he's going to have to pin Brock and I'm sorry but a few Hogan-esque chair shots, a weight belt whipping, and a nail rake to Lesnar's back just isn't gonna get it done. Sure Hogan will put up a fight, but in this environment, Lesnar is going to put up a better fight. Lesnar defeated the Undertaker inside HIAC in convincing fashion. The Undertaker once defeated "Hulkamania" Hogan by simply Tombstoning him onto a chair. Lesnar is going to do far worse to Hogan than that.
Also, those of you citing that Lesnar's one HIAC match means nothing are also grasping at straws. Lesnar's one HIAC match was against the man that threw Mick Foley off of the cell, the man who choke-slammed Foley through the roof of the cell, and the man who popularized the HIAC match itself. That gives Lesnar a significant advantage against Hogan in this match.
I understand that Hogan is bigger star than Brock but he's not going to win this match. It's the gimmick rounds that are supposed to stop this thing from coming down to Hogan, Austin, The Rock, and Cena every year. In any other match I would've voted for Hogan, however, it's just bad luck on Hogan's part that he drew this match type against the Beast Incarnate. Eat. Sleep. Conquer. Hulkamania.
Vote Lesnar.