Slowly some images of weapons associated with each one of the Bloodline are surfacing. For now it is unknown if they they are gonna be part of the game or are just concept art. They seem to be accompanied by other items known as Artifacts.
John Hanke has stated that "Each one of the lines has its own artifacts and weapons. If [a weapon or artifact is] from your line, it'll be better than if you find one from another line."
Anne Beuttenmueller mentioned that you will be be able to purchase weapons. "We don't want to have a pay-to-win situation, so you also get them when you go to key spots and find them". John Hanke has confirmed this and mentioned they are working to monetize in tie-up with companies like done in Ingress. He also mentioned players will be able to trade items amongst themselves.
Aksumite[]
A semi-auto Trunnion
Love and Hate blades
Cahokian[]
A Tomahawk Axe
Donghu[]
A Crossbow
Harappan[]
A Indus Sword
Koori[]
A Poison vial
A Boomerang
La Tene[]
A mace (but the image is a flail)
Minoan[]
A Kilij saber
???
???
Mu[]
A Hira shuriken
???
A shotgun
Nabatean[]
A semi-auto Trunnion
A recurve bow
A spear
Olmec[]
None yet(filler)
Shang[]
A Glock
Sumerian[]
A dagger with it's sheath