User blog comment:James12708/Bioware Hasn't written themselves into a corner/@comment-1786741-20121109194423

Mass Effect 3 is nothing like Halo 3 in that regard. Halo 3 ended in a way that Master Chief's fate is left open to interpretation and humanity is rebuilding. They had left plenty of room for a sequel, as was their intention. Mass Effect 3 had multiple endings, some where everyone could have dies horribly. Other than a blatant retcon, it's nigh but impossible to create a sequel that accounts for those choices. That, or it would require A LOT of unneeded effort but if you need to do that much work just to create a game around the ending, what's the point then? With this in mind, I don't think we'll be getting an actual sequel anytime soon.