Im hoping for a retrofit sovereign class but since they mentioned the Vesta class I think it will be that, still cool though. Also could be the long awaited ambassador class, which also would be cool.
Yes we are in need of a Sovereign Retrofit with a Sovereign Interior package so that we have a modern interior for the 2409 look, the generic interior the ships comes with is horrible. The Interior that was in the Enterprise E I think was the best I have ever seen for modern looking after the Galaxy Interior from Enterprise D.
I'm afraid it's going to be the Vesta class.
I know that some love and others hate that ship, personally i don't really care.
It's overall shape a bit too agular and the nacelles are too long, but besides that i don't really care. (It still looks 100 times better than some of Cryptics desings, althrough.)
Another guess the Ambassador class.
Personally i would love to see a Venture style costume for the Assault Cruiser or the advanced escort (everything is better than the Imperial costume, maybe i'm too overtrustful here hoping that they can do better...). I have given up the hope that they are going to make a fleet escort costume that looks actually good, lol.
I just hope that they will give us envoy, celstial and Venture ship parts for the Nebula class somewhen in between now and the new ship.
(celestial and Envoy shjip parts for Galaxy -R and Galaxy -X too, of course!)
Whatever they ship they add, my feelings are more than ambivalent when it comes to STO and new ships. (The devs tend to heavily dissappoint me on a regular basis for almost 2 years...)