Most, if not all all comic franchise are guilty of this at some point. I was reading Superman: Year One, and it had the engine block of a Star Wars Nebulon-B Frigate being using as alien starships. There were also Trade Federation battleships being used as mining vehicles. Some recent Star Wars comics have been tracing fan art, and I don't mean fan art of already existing Star Wars ships, but fan made designs. I also saw Atlantis from Stargate Atlantis in one issue, kitbashed with a bunch of other designs. In one of the Kelvin Timeline comics, there were Orion ships that were the Battlestar Galactica with Stargates sticking out of their rear.