This Polygon article discusses a potential acquisition of Nintendo. Personally, I would be ok with this only and only if Nintendo as a whole doesn't change. What I mean by that is, they still make games and consoles and everything is exclusive to them. But, Disney can use their IP's in things such as movies and in their theme parks. The author of the article does make some good points, especially in relation to Iron Man where he was kinda just a B-list superhero until Disney gave him a marketing push ect. I feel like they could work wonders with Metroid and Star Fox in that department, imagine a full live-action Metroid movie by Disney(like Maleficent or the new Cinderella movie) accompanied by a Nintendo metroid game? Fox and his crew could be a good idea for an animated movie and could give the video game series a much needed rebirth. A Mario movie? A Legend of Zelda movie? Both I think are great candidates for movies because like Wall-E proves, a character doesn't necessarily have to speak much to make a great movie.
On the console side of Nintendo, this could be a huge benefit, Disney is such a huge company that 3rd party developers really just cant ignore considering how much power they have, 3rd parties could just flock to a new powerful Nintendo system just because they would have the support of Disney. Nintendo having the backing of a TV station like ABC and ABC family during the Christmas is pretty big. The part where I see this getting problematic for us Nintendo fans is if Disney would want to drop the console division and make games for the other systems. Just some food for thought I guess.