Comcast will carry the NFL signal, but they are charging a premium for it.
NFL wants it out there for everybody to see on the lower cable tiers (i.e. more ad revenues.) There is a simple deal to work out, but corporate greed and hard headed-ness has brought it to a standstill. Perhaps the lack or revenue and dropping cable subscribers during these trying times could bring the two sides to a better "understanding." And we would get to see an otherwise "hidden" football game.