Has a massive Deus Ex 3 secret slipped out?

A discrepancy between two versions of the official Deus Ex 3 teaser trailer could have let slip the biggest reveal to date on the sequel.

In one version of the trailer, a scene has had the date "2027" removed, while it remains in the same scene in a second version.

It's led to CVG speculating that the sequel actually acts as a prequel and could well be set prior to the original Deus Ex (which was set in the 2050s. Invisible War was set 20 years on from the first game).