Re: Refit Dreadnought.... Question?
Nope. The only possible places for an on-screen Refit Dreadnought would be the monitors in Treks I-III, or as a member of the Frankenstein fleets in Deep Space Nine. Both of those have been documented and described in such detail that I don't think something as recognizable as a dreadnought could've slipped through the cracks.
“I come here to have fun and fuck around merrily. I expect to showered by all kind of random crap.”