User blog comment:The Milkman/The Writing of the Ending/@comment-30764484-20120605044952/@comment-30764484-20120608042332

Considering there are only two MacGuffins, the Catalyst, and the appropriately named Crucible, yes.

Well, there is no Deus Ex in IT, because the kid is Harbinger.

Also, the idea that where you are isn't real was made pretty clear in the Geth Consensus, where, just like the ending, everything around you is created from your memories. Legion sums it up very well. But if you want a list of foreshadowing, they're pretty easy to find.

Even the concept of Shep not being able to be indoctrinated goes against the lore, but IT fits the lore perfectly.