I must admit im truly hoping its the andorian warship, but more than likely that ship will be given as another loot bag item like the jem hadar bug and galor.. but i can always wish upon a star..lol
but if they do release the ambassador class, will that be given as a prize for any1 who has attained ambassador rank within the game, not likely but would be nice for all the ambassadors to be presented it as a gift for their achievements..
By the mid-2360s, this class of "old-style" star cruiser was on the fringe of being phased out of the fleet. Those that had been decommissioned, including the eighty-year-old Hathaway, were stripped of their offensive systems and rendered "warp inactive," which included the removal of all antimatter.
While true, Drakron, these are desperate times where they're even throwing Constitutions at the KDF and Borg. And ships are mothballed (as opposed to dismantled) so in desperate times they can be reactivated. Its possible, though I imagine either a Caitan or Andorian ship is more likely.
My guess is the Saucer Separation Galaxy-X. We've already seen pictures of it posted on Twitter. The Galaxy-X was in All Good Things, the last episode of TNG. Hmm, seems pretty likely. But just a guess, anyway.