User blog comment:TW6464/Retaliation DLC: Myth or Truth?/@comment-5287758-20120917151310/@comment-4310096-20120917171827

"The Collector swarms are just Reaper tech" - So are the Collectors themselves.

They can be cloned, plus the fact that there were more than one ship (the cruiser we destroyed in ME2 and the other ship that Vega mentioned in his backstory) shows that there sure can be more Collectors besides the ones we killed in ME2.

I also cannot understand why so many people are against a Collector faction (this is absolutely not meant as an offense to you or anyone else opposing the idea, I just don't get it). The thing is just, that many players find that the enemies are lacking variety and it's true if you compare the amount of enemies in ME2 and ME3. The Collectors were never said to be extinct (if you can call them "race" that can go extinct) so it isn't a big plot hole to make them re-appear as new canon fodder for the reapers.