With so much great support coming out for G in KTK I see Nissa Sitting pretty and prob going up in popularity. I would expect to see a LOT of Mono Green, Green Rush and even some RUG tempo/Control. Expect Nissa to hold at least 2 if not 4 spots in most decks that run forests, just her ability to make trample creatures will be an asset and since board wipes are no longer uncounterable I see RUG being decent just to run a few counter spells for the few board wipes you'll see. I'm guessing she'll hot close to or over $40 in the first few months of the next Rotation.
Launch the fleet with a Battfield Thermatuge, (Strive costs 1 less to cast for each creature it targets) could be fun in a weenie deck with Brimaz and Elsepth.
Otherwise you could splash U for a 1-2 Thassa to make MoC unblockable to guarantee his effect goes off, so instead of ramping heavily, just Mana Curve to 5, reduce your opponent to 1 and burn him for game. should be able to make it consistent enough with scry, to consistently get it off. Just a thought.
I'm putting my guess that GWB will be the main colors for control (Since Khans has spoiled that as being control) White will have the board wipe, (Prob with green splash Like Verdict) Black will be targeted removel, and Green does what it always does best remove enchantments, artifacts everything but creatures.
Launch the fleet with a Battfield Thermatuge, (Strive costs 1 less to cast for each creature it targets) could be fun in a weenie deck with Brimaz and Elsepth.