Ryuhza
[13] Hero
Keep all the main cast outfits from Soul Calibur 4 & 5 and bring them into Soul Calibur 6's CAS.
That would be great, and I'm still quite annoyed that they didn't do so in SCV (aside from a select few released as DLC). Bringing pre-IV outfits in would be a lot more difficult, as the asset quality is a considerable step down at that point and the models/textures would have to be redone. Plus, the outfits in IV were already separated and usable for customization in IV and Broken destiny (2p and 1p outfits respectively). This seemingly wasn't the case in V (which is why many--but not all--of those parts were sold as DLC after the fact), but it shouldn't be unfeasible.
It's not like the asset quality is notably better in SCVI than in SCV or IV. They've already reused a lot of the models for hair, faces, and weapons, and Tekken 7 even borrowed some of SCV's models for its limp dick customization. It just makes sense to use the rest.
I wouldn't be surprised if Bamco charges for it all though, as a cheap way to build up those "over 100 new customization items" teased for the season pass.