For me, it would be something out of the old Republic games. Besides Revan's lightsabers I never saw other attemps or explorations, mostly due to the fact that the reference images are laking.
But a Darth Malak Lightsaber, Bastilla, and the sith Triumvirate from KOTOR II would be great, eventhough I have the Nihilus hilt from holocron, I think the community could explore more toward these storylines.
If one day we have an Old Republic movie, that could kickstart the interest...
Never played TOR btw, but with the improved graphics quality, there are much options there.