Honestly we do not know if it will be a "big" update, it could be as weak as Hearth & Home when people expected new building parts to find merely a handful that now use a new material.

We do know some new weapons, we do know new stone, a new forge, some food and the zone stuff but aside from that we really don't know what is going in.

We don't even know if it will be out this year, the way it has been worded it could be the last fiscal quarter of this year, which is technically next year.