I'm not expecting a great deal out of KT B. Lots of roster swaps and the loss of Insec doesn't bode well for them this season. Both Najin teams coming out of that group seems likely.
Samsung White is Ozone. Behind the group A picks, White winning group C is the next easiest call to make. Frost hasn't looked good recently, and they haven't had any major roster changes to try and fix things. I see S getting that #2 seed.
Don't sleep on the JinAir Stealths. They didn't qualify for Champions in the spring, but they are a good enough team now to contend with KT A for the #2 seed in that group. KT A, while really strong, was too inconsistent last season. If they managed to straighten things out, they'll get out of the group. If not, the Stealths have the ability to surprise some people.