I will just assume that all the other minor content upgrades took that long because they've been working on the mistlands inbetween, so I expect quite a lot.

- at least 1 new armor set (all biomes except for plains have 2 armor sets as of now)
- hopefully some more blackmetal weapons
- a new tier of weapons including at least a new bow and better pick
- another 'magic' weapon like frostner but with another damage type (maybe poison)
- longsword weapon type for most metals, hopefully not with the same animations as two-handed axes
- new building blocks, maybe a new tier of wood or stone
- 5-10 new mobs, 1 new boss
- a few new food sources
- maybe the next tier of potions (so far we have only medium stuff)
- the fishing stuff (didn't expect that but they teased it so I might aswell include it)
- hopefully some minor additions to older biomes