Yer, I like this suggestion a lot. I'm pretty sure its already beem suggested too. Trunks has his sword, but shouldn't only use it in Adv Melee.
Also, I was looking through the ESF Directory [ Sounds ] and I saw these files which contained Trunk's sword slashing through, and they havn't been used in 1.2. Therefore I think they should go to use. I like the Idea a lot. Trunkso is SxC