Romulans, from the future!!

Star Trek Online has added Romulan ships to their temporal lock box, which has previously been used to introduce 29th century Federation and Klingon timeships to the game. As with the previous ships, the conceit is that the ships have arrived through temporal rifts in Tholian space, and much of future technology has already been stripped by the Tholians by the time they can be recovered. So they are effectively standard 25th century ships that look futuristic. Two variations of a new Romulan timeship will now be available in the game, the R'mor class temporal science vessel, and the mirror universe equivalent, the Talvath class temporal destroyer, both come equipped with time manipulating systems, and look like this:

You can see and read more about the new ships on STO's announcement. STO also recently added another Romulan ship, exclusively for veteran players. The Daeinos class heavy destroyer has two appearances, depending on what you are doing with the ship, as Cryptic describe:

Like most Warbirds, the Daeinos is a highly versatile and adaptable ship, with a balanced focus on firepower and survivability. While in its innate Regenerative Mode, excess power is transferred to the Auxiliary System and you gain a bonus to Starship Shield Systems. It comes equipped with a prototype Dynamic Tactical System console (or DTS). This console allows you to transform your ship between Regenerative Mode and Tactical Mode. In Regenerative Mode, your Tachyon Inversion Beam is enabled, which can siphon shields from multiple targets. Activating Tactical Mode transfers power to your Weapon Systems, and increases your ships Starship Targeting Systems skill, granting an Accuracy bonus. In Tactical Mode, the DTS console enables a powerful multi-targeting Lotus, which is capable of piercing multiple targets. However, while in Tactical Mode, your Starship Shield Systems bonus, Auxiliary Power bonus and Tachyon Inversion Beam are disabled.