The exciting sounding Siege Update for Dwarf Fortress now has a release date, with it set to arrive on November 3rd and here's what's coming with it.
Some of what's been detailed about the update:
New enemy weapons: Battering rams, trolls can now carry giant pickaxes and blocks for building
New enemy behaviours: Enemy behaviour is now classified into different roles (charge, hang back, ambush) and can path around dangerous areas. Engineers can build floors and stairs. Enemies can break through fortifications and raised bridges. They can also dig underground through natural walls. Goblins also bring more kinds of mounts and their demonic leader
New weapon: Bolt thrower. This is a siege engine with a fixed location but can be turned freely in any direction. It fires faster than a crossbow and the ammo bin can hold 100 bolts. Siege operator skill matters but unskilled operators can use it more effectively than they use hand-held weapons.
Reworked weapons: Ballistas and catapults are more effective
Changes to traps: Goblins can rescue caged allies. Water and magma traps will not be as effective as before, so you’ll have to try a variety of defensive tools instead of relying just on one, to properly protect your forts.
More detail on it will be noted on launch day, but for now you can watch the new trailer below:

Direct Link
They've also teased a little about the future with plans for "more magical content and features, such as warlords and demon-trained sorcerers that could make sieges on your fort even more dangerous and varied".
All sounds great to me. Nice to see it continue to expand with a whole lot more.