The Super Bowl teams. Easily. No team chemistry, particularly on the O-line and D-line, would get exposed. Quickly. Not to mention, half these guys are used to completely different schemes both offensively and defensively, and that they'd only be able to stick to simple plays due to not all having memorized the same playbook.
I'm really surprised at how many people took the Pro Bowlers in this poll. Short of having some serious extended time to practice, scrimmage, and work/plan together, any average regular NFL team would tear them apart.