My friend was in the Starbase Fleet Defense instance, and he saw a Scimitar Dreadnought in it. It was going around helping out, cloaking a couple times, as well as blasting its thalaron weapon maybe 4-5 times, each time wiping out a handful of enemy vessels.
Now I'm not sure how it's possible. We can't play as Romulans, so we can't call a Scimitar via fleet support yet. I'm not aware of equipment that can summon one, and it definitely can't fit in a carrier... what's up with it? Was a GM flying it? Was it a glitch?