Eye of the Equinox as a Jungle Item
The new sightstone items seem a bit bad on most supports, but this one's a bit interesting to me. The stats on it are pretty good, it's basically a superior ruby sightstone, 500 HP is quite good and for 2200 gold it's a very efficient item. Most supports probably won't want it because buying it means sacrificing FotM and they're unlikely to generate enough gold to get more items to make it worth it and where tank junglers come in.
Tank junglers don't run into the exclusivity problem since they don't build FotM and smite items no longer have bonus gold. This means that they can build Equinox without actually sacrificing any of their items. In addition it gives them extra gold when they gank. It's kind of like a reverse SotAG, you generate charges as you farm and then pay them off after you gank, it's no small amount of gold either, You'll get 80-100 gold after a gank.
Of course it competes with the new Tracker's Knife item, but I actually think it may have a small edge here. With ADCs getting so powerful the value of red smite goes up, buying Equinox allows you to go red smite without forsaking vision in some way.
Anyway this is just my theory on how jungle tanks will develop into the next season. I'm still not entirely sure how it will go but this seems at least plausible to me.