Not sure if you can do a post construction install of a magic corner. I like ours. We have 3 blind corners and I hate lazy susans so one is a magic corner, one is a le mans and one we left blind so I could figure out what to do with it later. in the magic corner I have our ninja, a couple of small pots I don't use daily, mixers. The only thing I use daily is the ninja and it's very accessible. Here is a pic and also of the le mans. I really like both and whatever complaints I have about either they are a million times better than the corner I left blind which is sort of useless. I am trying to figure out what to install there but it's such a pain to bother with once you've finished your reno.

Whether or not you think you'll need this space, I would put the Magic Corner in now. Realistically, you're unlikely to go back later and install something. There are always oddball things that need a home like Christmas cookie tins that can be stowed there. You may even find it's a very handy spot for things like a blender.

My daughter does not like lazy susans and wanted top drawers on either side of her stove and chose blinds. She is storing her ice cream maker and crock pot on the lower shelf of the blinds. She has a couple of baskets at the front of the shelf where the door opens holding her potatoes and onions. She can easily remove them to get to her large appliances on that shelf. These are not frequently used items and she has no large pantry. I think a magic corner works best if you have a large opening because the you get a larger shelf that is easily accessible.

I went with lazy susans for both of my corners. In one, I keep all the baking food items--canisters, chocolate, mixes, etc. In the other, the kids used to keep their snacks. I now keep all of my mixing bowls there--they're easy to get to, they don't fall off because they're heavy enough, and I have enough room to stack all the same size together instead of nesting them.

Thanks for the replies everyone. I think you are right, if I don't put it in now, it will never happen. I'm going to go ahead with it and then figure out exactly what I will use it for.