User blog comment:GodzillaMaster/ME3 Multiplayer Ideas/@comment-4729088-20120701094647

I know these are ideas, and they would be kinda interesting, but no. Adding the Covenant from Halo or the Space Pirates from Metroid/Metroid Prime wouldn't work due to copyrights, programming, you get the idea. Also, as a fan of all 3 universes, I don't really want to see this happen.

Yanme'e/Drones are annoying enough as it is, but in ME, I think they'd get worse. And the Kig-yar/Jackals, no thanks. Not enough variety for the Space Pirates to go on, 4 units isn't enough. If anything, I'd rather there be rogue Batarians and Vorcha with Varren and a few Merc Krogan with Wreav's personality/mindset, and that annoying ship from Garrus's recruitment mission in ME2.