In many ways Vick does make a lot of sense for the Eagles, and they make sense for him as well. Vick needed to go to a team with a established leader and quarterback. By all accounts McNabb is in his corner, which should help give him credibility in the locker room. Vick also needed to go to a team that was a contender and a well run franchise. Vick makes sense for the Eagles, because of his previous experience with the West Coast offense (though he wasn't exactly Joe Montana in Atlanta), and his raw athletic ability. Philly puts a premium on speed and agility among its skilled players. The idea of putting Vick in the same backfield with either Brian Westbrook or LeSean McCoy was too attractive to pass up. Vick should allow Eagles to run their own version of the "Wildcat" offense, and provide headaches for defensive coordinators around the league.
So on paper Vick and the Eagles look like the perfect fit for each other, but what happens on the field could be another story entirely. Vick hasn't played since Week 17 of the 2006 season. So there could be a considerable amount of rust on his arm (not to mention his legs). Also, Vick's production never matched the hype and talent surrounding him. His career QB rating is 75.7 (McNabb's by comparison is 85.9), and he's never thrown for more than 3,000 yards or 20 TD's. The other big issue for Vick and the Eagles is the fan response to him. Initially, the Eagles could lose some fan support with his signing, and down the road Vick's presence could open Pandora's box in Philly.
It will create a negative buzz (and press) that will follow this team around for the entire season. Animal Rights groups will unite against the Eagles, creating additional complications. Also, the Eagles gave Vick a 2-year deal (2nd year is optional) for nearly $10 million with incentives ($6.8 without). That is quite a bit of money to pay for a back-up quarterback who might play 10 plays a game. Finally, if McNabb struggles to start the season and Vick has some success in his specialty role, it could create a quarterback controversy when there shouldn't be one. Remember this is the same fan base that has pretty much wanted to replace McNabb from day one. Given that precedence, I think there is a chance that this could end up dividing the Eagles' locker room. While there is a chance the Eagles could catch lightning in a bottle with this signing, there is a much greater chance they just end up getting burned.