Two thoughts:
1 - here we go again.
2 - a successful mobile football video game isn't going to play anything like a successful console football video game. The touch interface and effective requirement of a freemium release (the app is given away for free, but it pushes the hell out of in-app purchases and expects to make its money through users making lots of them) mandates a different sort of game design than a typical boxed release.
Translation - in the hypothetical world where 2K ports NFL 2K5 / APF 2K8 and calls it a day without any consideration for the advantages and disadvantages of the mobile platform - which really, is what most console sports game developers have done to this point on mobile - the game will bomb and it will not be an enjoyable experience.