Justac00lguy
BooBoo
I personally don't see the point in that. Out of all the games I have played that feature co-op, they have always had the same story to the single player mode. by making a Co-op separate from the main story, you are practically making an entirely new game just for two players, which I don't think makes much sense.
In general, DLC should absolutely stay way from Zelda. There are some games that don't need it and Zelda is one of them. If Nintendo do mysteriously include co-op they should keep it equal to the single player, it wouldn't be right or fair if co-op players could do more then traditional Single players. I'm open to new ideas for Zelda, but personally I think co-op won't benefit Zelda at all since it's targeted at a single player audience.
Keep in mind this is just an idea am not an expert....but for me co-op seems like a very cool idea I've always wanted to explore the world or a dungeon with friend or someone online and compare Zelda skills etc.