Nahh, I think it has more to do with bandwidth, and that the negotiations were complicated by the sale (which was finalized in July, BTW).
I don't think that DirecTV and Comcast are playing any kind of dirty pool with E*, for the simple reason that that would royally piss off the Giants, A's, Sharks, and Warriors. It's not that hard for sports teams to start up a new RSN; just look at what happened in Chicago, when all of the teams left FSN Chicago and started up their own network, Comcast SportsNet Chicago. In fact, there's been speculation that the A's might eventually do just that within the next few years.