All of that may be true, but the problem is that Nintendo's businesses are highly uncertain because they're one of the console gaming co's.
If you were talking about Valve or TakeTwo or EA, that might be something different.
But I have a hard time seeing Comcast brass wanting anything to do with a risky or uncertain business like Nintendo.
Nintendo has powerful brands that can be exploited in theme parks and movies, but outside of that they derive the bulk of their revenue from their console markets and various attached aspects of those.
Comcast wants no part of a finnicky business like that.
Nintendo can have a console sell 100m units in a generation followed by another that sells 1/10th of that.
Look at what they've done to Universal's movie business; completely converted it into a stable franchise heavy business. Nintendo won't ever really be like that, they'll have booms and busts.