Based on this trailer we've already seen most of what the Special Edition has to offer.
We have seen all new playable characters(Vergil, Lady, and Trish) and we have seen LDK mode(Which is new for console players.).
The only things we haven't seen/aren't sure about yet is the "Improved Gameplay". Which I really hope Isn't just a reference to them improving the sprint mechanic.
But it's probably just alluding to certain buffs and nerfs to certain moves and enemies. And probably enemy A.I. as well.(Which I would like to see a change-log of.)
Also the, "And More!!", at the end; which could be a reference to, anything really...

What are your thoughts?