The main thing I'm hoping for is a jump in quality similar to V2 > V3. However if that doesn't happen, then new features/parameters to manipulate the voice and get new kinds of results. Both would be awesome :D
saaaaame I really want the same jump in quality as V2 > V3 had. I hope the engine is backwards compatible to at least V3. I'm pretty sure V2 is gonna be gone with this era which sucks for the V2 loids.... (cough piko and the engloids)
I'm hoping to see some updates of V3 titles, esp Yamaha's. Like the Zola Boys and Galaco. I'd be happy with Kaito too esp if he came with a new English bank (and a Power bank, lord knows the guy needs a Power bank lol)
So the english vocaloid shop is up and omg I am so excited!!!!!!!!!! There are a ton of english videos up including how to use the new editor. Also the upgrade for V5 pro that includes CYVA, Songman, VY1, and VY2 is like 213 dollars.