I am. I've only got DKR in the form of it's tenth anniversary TPB, and I've never read DKSA, so I was very pleased to see the release of the combo HC. But then they announce a third one! I'll probably still get the combo one. As you said, could be years until they release all three-in-one. Then I'll cross that bridge. (Now watch them announce it this time next year ).
As long as they immediately release DKIII: TMR in deluxe, I'm okay.
You can't ask for a new one, since that version's misprinted? Either through whomever you ordered from or DC itself? Isn't that a thing? Shame, otherwise.