I don't know if these can or will be implemented at some point but here is a list of possible weapon type that could be put in to the game:
Two-Handed:
Lightsaber Greatsword
Lightsaber Battleaxe
Tech Battleaxe
Tech Mace
Lightsaber Spears or Pole-arms
One Handed:
Lightsaber Whip
Lightsaber Shortsword (offhand)
Dual Wield:
Lightsaber Tonfa
Like I said these are just suggestions, but it would be awesome to see some sort of new weapon types in the game.