Well, the problem with the Dakimakura is they require a lot of time to do, If you thought 1080p was large, Dakimakura require a canvas that is 8x larger, and detailed to perfection because it's being printed. That's why I'm having to wait until the game is completed (though there is a likelihood that I will actually have time to work on them and finish them before hand).
So I can't actually make mockups of them during the KS. However after the KS I will be discussing with everyone who pledged for a Daki what kind of things they'd like on it so I can really make them a labor of love for everyone on the Kickstarter.
That's partly why they will be limited edition, so people who have them can see an idea they had used and it's very unique. Whereas I will make a Dakimakura for my website and it will be different.