User blog comment:The Milkman/The Writing of the Ending/@comment-24174486-20120726200543/@comment-2250460-20120823185405

Do you guys really feel the need to argue so badly that you're starting up a conversation that ended a month ago?

As to the point, neither the Catalyst or the Crucible are a Dues Ex Machina because they are not new as we already knew about them. Sure we didn't know the Catalyst's exact nature, but we did know the Reapers had to have come from somewhere, they are machines, we knew we would find out about the exact nature of the Reapers (and their creators).