A new Ask DST has just been posted:
http://www.artasylum...sion-continues/
Now this one reply by DSTChuck got me thinking:
"The only thing I am sure about, with the new ship we announce, is that some fans will be very upset with the choice."
That actually kinda speaks against the Reliant, as this seems to be a very popular ship(among the Enterprise-C, Voyager and Defiant, which have been denied a couple of times by now), which most fans would be pleased with.
So until I read that, I was 99% sure it'll be the Reliant, as all the other Federation ships either have been denied or are simply not an option, in my opinion at least.