Boeing unveiled their 12th Man 747 today, which will start flying around the sky sometime tomorrow. According to Jeremy Dwyer-Lindgren over at Airchive.com, there's plenty more Seahawks airplane action happening too:
"Alaska announced it would paint a Boeing 737-900 in honor of the team’s quarterback, Russell Wilson, earlier this week. The airplane will then run a special charter tailgate flight from Seattle to New Jersey for the big game. The carrier picked up Wilson as its “Chief Football Officer” just prior to the team’s playoff berth late last year, and has been utilizing him heavily in promotional material ever since."
UPDATE: The plane is currently flying overhead Washington State on a flight path shaped like the number 12. Watch it live here.