I picked up the 22.99 copy today at best buy, Bluray+Digital copy. I didn't see any coupon to order the 3d disc for $5.99, which I was planning to do. I went to disneymovierewards, logged in and entered the normal code thinking it might popup the offer, but it didn't, and I can't find it searching on the website either.
If I had to guess, I would say that only the 3d copy comes with the coupon, which is for the 2d disc.
Can anyone else state what you found in yours?