this reminds me, of me saying my star war toys are ACTION FIGURES and not Dolls. :laugh:
I never herd of a one handed staff. Usually they are called Wands. It's Harry Potter time!!!
Wands are small, they are usually a foot in length at most, and are very thin, like a stick.
A one handed staff, often called a rod, is a short staff, 2-3 feet in length, but much wider than a wand, typical diameter would be comparable to a regular staff.
That staff in the trailer looked too thick and crooked to be a wand. The way its held also shows that there is length beyond the wrist, which is how a rod would be held, in the middle of the rod, whereas a wand is held at the end.