In Transformers The Movie we see Unicron rebuild Thundercracker, Shrapnel and Kickback into Scourge and two Sweeps respectively. He also rebuilds Skywarp and Bombshell into Cyclonus and his armada (of one ). In the next shot we see only Cyclonus fly into the Decepticon ship and Scourge is followed by three Sweeps! We never ever see that "armada Cyclonus" ever again.

So some people believe that Bombshell or Skywarp (whichever you believe isn't Cyclonus) became that third Sweep and chalk down "armada Cyclonus" as an error. Either that or maybe he became Cyclonus II (aka Krunix)