vger was 82 astranomical units long. a bit big for armada 2...
how about this. a dounut race. little peon donut holes, massive jelly filled warships, and chocolet ablative hull armor.
Since you all are talking about new races, how about a race from the 5300th century. In this time all of the races in the Milky Way and half of the galaxies in the Universe. The ships would be a mixter of all six races in technology and design.
They would also have supper standard weapons (non temporal) which can cause massive damage. To confisate for their power, all the other races would have stronger hulls.