I'd assume Namor's little terror cells spread across the country would help also. Not to bring up any real world comparisons here, but a few atlantean agents blowing up the Baxter building or the X-Mansion in the middle of the night might sway things a bit. Also given the current situation, I wonder if I shouldnt add Dr. Doom and Latveria to the Hulk and Namor's side, since the merpeople are having a big slumber party at the Castle.