im sure the weapon setup will be similar to ele and necro
MH: Sword, scepter
OH: dagger, focus
two hand: staff
that allows for the caster goodies and the sword/dagger setup could allow for illusionary weaponry (it seems to have been a big favorite with the devs, i remember them all giddy on ME/W flurry with a scythe for the nightfall skill preview) plus mesmers always seem to have the look of sophistication, so it could be seen as "dueling". also eles have double dagger and necros use axes for their "martial" caster weapons so a sword would be a good way to round out the weapon sets among the scholar professions. they aren't going to create a new weapon type just so only one profession can use it