IDW have put up a five page preview for Klingons: Blood Will Tell Issue 1, due later this month.
Covers 1, 2, 3 & 4, pages 1, 2, 3, 4 & 5.
The five part series will depict TOS Klingon episodes but from the Klingon's point of view. This first issue will also be available translated into Klingonese.
The forth page of the previews has a very nice little explination of the different look of TOS Klingons building nicely on a flashback to the Enterprise episodes which explained the biology of the difference.
When the miniseries was first annouced I was unshore, I feel both TOS set within the TV-series and Klingons are hugely over used in the franchise. However as the first issue comes closer I'm getting excited about it, this is looking like it could be a very clever and very good addition to the Trekverse.