Actually, I changed my mind on what I want to ultimately vote for: Fire/Poison
It's arguably the most versatile typing the current slate has to offer, whereas the Ice-types will probably end up with predictable roles (dragon slayer for Ice/Steel and glass cannon for Ice/Rock). Don't get me wrong, we could use a dragon slayer in CAP (a proper, bulky one that is, whether it be bulky sweeper or just a plain tank), which is why I'm still perfectly happy for Ice/Steel to make it through. As for the glass cannon that Ice/Rock will be, the community has already made one; it's called Syclant.