i highly doubt this due to the fact that both networks are national networks and any deal would put them in direct competition with each other for eyeballs for the game. I realize the situation in Iowa with Mediacom not being worth jack, but most cable/fiber operators carry not one, but both of these networks. I can't imagine the NFL network would want to invite competition unless BTN offered a ton of money (which I can't see them doing for the same reason NFLN wouldn't want to offer it). the local access in Iowa through local stations makes a great deal more sense since NFLN wouldn't be inviting competition since mediacom doesn't have NFLN.
Lucky for me, I have NFLN & BTN in STL through AT&T U-Verse.