User blog comment:James12708/Bioware Hasn't written themselves into a corner/@comment-4950455-20121109062047/@comment-24174486-20121109125946

"All that talk of dark energy in ME2 came to nothing ... There is no 'background' for this dark energy 'problem'"

...

...anyway, it wouldn't have to be the same problem that was originally planned for the dark energy. It could be something more minor but still serious—perhaps an experiment from a previous cycle.