The game "Marvel: Ultimate Alliance" had a system where each side quest's out comeoutcome (and some choices that were tied to the main plot and couldn't be avoided) were recorded. At the end of a full play through, the marvel character Uatu tells you how each of these choices (including never acting on the choice) will alter the course of history. Most of these choices have a good and bad outcome that ties the good out comeoutcome to completion of the side quest and the bad out comeoutcome to non-completion. In the case of the unavoidable mission, there is no correct answer and both choices recievereceive a negative outcome where the X-Men are disbanded... though one is with a far lesslower body count.