First time posting here so go easy on me :p... been a long time reader though. Was looking through the talent specs and here's what I ended up taking a look at
Frost Heavy (w/ Howling Blast)
51/20-The point of this build is to keep HB and rotation would be pretty similar to what we had before with 44/27. Only now it's more based in frost. Btw epidemic is taken only to be a filler since the other 2 don't have as much use. If you wanted you could still put 2 in morbidity but since this is based on FS, it's not as useful.
Tri-Spec (Zomg could it be back?)
15/20/36-This build is still based of the IT spam that you had with 20/51. However since there was discussion how white attacks possibly going to be a larger % of our damage, I though perchance that going up the blood tree to buff that might not be a bad idea. Note that I did not take glacier rot w/ this particular build. To get that, you'd have to sacrifice 3% crit or bone shield+2pts from desecration. Either way, just wanted to make a build to try to bring back a little bit of nostalgia. Also, the newer gear with higher armor will scale pretty nice with Bladed Armor.
UH Heavy IT Spam -
23/48-Another build based off of IT spam, this one is focused for the most single target dps talents you can pick up other than getting gargoyle. Very similar to the 20/51 posted earlier, you could also change this spec up to dropping Glacier Rot and finishing up the UH tree. I personally picked Outbreak 3/3 over Wandering Plague 2/3 since the build is mostly focused on single target dps.
For any of these, I'd say that FC/RI is probably gonna be what we'll be looking at for runeforges. With an extra 5% vulnerability and CG getting changed to PPM, I think that would net the best DPS.
As for weapons, the first one would obviously be S/F whereas the latter two could go F/F or S/F. Again, just some preliminary thoughts being thrown around. I really don't want to go back to 2h if I can avoid it, but some of the changes make one really wonder if Blizz wants to see DK's DWing at all.