So I think everyone will probably start the game with a Flask and either boots or cloth or something. It's a free three health/mana potions each time you base.
New DeathFire is great again, Eleisa's might be worth getting on Heal supports, Enchantment Distortion is wtf (1/4 off your utility summoners? Haha), Executioner's is actually okay, Rageblade new passive is interesting, Kage's Last Breath pretty epic offensive support item (slow auras, free mana regen, keeps the GP/10!!!), Liandry's Torment is going to be ******** on Singed or Rylai's champs, Solari got a solid buff, New Malady gonna be OP on AP Teemo (Teemo in general will be dumb as hell with some of these new items), Crucible seems pretty good, Muramana gonna be dumb on Yorick, Phantom Dancer nerf pretty significant (even if you can ignore unit collision now), Hydra is going to be ridiculous on Fiora (since she can lifesteal off it, might as well get that instead of BT), Black Cleaver got a pretty hefty buff for AD Casters, Rose's Pride can be very strong for AP Assassin's/melee, Zephyr so sexy for Xin Zhao (he can build Lucidity boots with that!),