I was wondering the other day about Haestrom. With Leviathan, we finally got an explanation for what the "Prothean" sphere we found in ME2. But do you think there'll ever be a DLC or something that'll explain the dark energy that characters kept talking about? Will we ever find out how Haestrom's sun became unstable? Unless I missed something, all we found out was that somehow dark energy was introduced into the sun's core. No explanation how . . . or who.
It just felt like a tantalizing hint to something in the future . . . but nothing's come up.