I have to question this poll, since I feel anyone who seriously says "Semi-stall" does not understand the concept of battling well enough, but I digress.
I'd say balance will prove to be incredibly lethal. The new trappers and general "counter" abilities seem to provide power to breaking down an opponent's team to allow for an unstoppable sweep. Weather teams will also definitely see a rise, but balanced teams are just so versatile and effective that I can't really see them being less than the top.
So I predict balanced teams amongst the top players, but there will still be the lower-tier battlers wielding stall left and right (I don't mean that all good players use balance and all average players use stall, it's just more common).