No, not really. Since I think Eric had been saying since the first game he'd like to make the story co-op, I was thinking each mission of the game you'd team up with at least one of them and have the option to play it with that many people.
JFK, Abe Lincoln, George Washington and Theodore Roosevelt for a 4 player co-op campaign. Roosevelt is already a badass, he gave a speech with a bullet in his chest. Andrew Jackson is another good choice, someone tried to assassinate him so he chased down the assassin and beat him with his cane.
Monster Hunter Tri is one of the best Capcom games of this generation. Of course, that's not saying much.