Hi Kenny,
Perhaps someone with a more absolute answer will post later on, but for now I will give my views/answers to your questions.
1) As of right now it is too early to say for certain if the K2 Kroma will definitely run on the 18650 batteries. Once some people have the Kroma in their hands, we will then be able to know for certain.
2) I agree with you that if there is to be a version with both White and Red LED's it would likely be pretty popular. There has been some talk of people considering even modding the stock Blue LED's with White ones. As for if SureFire will make a version like that in stock for sale, I would think it is a possibility. However, being that this 8 Blue/8 Red LED has been said to likely not be available until after summer's end, there could be a wait on that, if indeed one is planned.
I know I was not able to answer your questions exactly, but I hope I might have been able to have been of some help.
All My Best,
John