User blog comment:PsijicThief/Dark Brotherhood in Skyrim/@comment-6365350-20130909092125

A most interesting theory and a very plausible one too. The very essence of the Elder Scrolls games is their ability to allow all options happen. take the warp in the west for example, where all possibilities happened. Either way it will not affect the overall story though I personally hold the main storyline canon rather than the killing Astrid one.