User blog comment:The Inceptionist/A Multiplayer DLC Idea/@comment-25305799-20120730234743/@comment-1388547-20120801000433

Exactly. BioWare could easily add the Collectors back in without negating the importance of Shepard's mission in ME2 by saying that Shepard destroyed the heart of their operation, but there were a few Collector away from the base when Shepard destroyed it. And I'd love to see the Harbinger possession mechanic return -- along with the player decision to either take down the Harbinger-Collector immediately (after which Harbinger can soon take control of another Collector, so the threat isn't really removed) or kill off the minions first (allowing the Harbinger-Collector to keep spamming nasty biotics at the team). It would be very different from the current boss-level units in MP, and would make a nice change of pace.