There is a Sci-Fi story I recall from a few years ago that came to mind and I can't seem to refind. It's a space ship that crashes and is found on Earth by some young adults to become the core of a new crew. The original was either thrown back in time during a last battle or did a time jump to prevent humanities extinction. The ship is obviously equipped with an advanced AI etc. Suffice to say the re-crewed vessel rebuilds the fleet and goes out to do unto the enemy before they find earth. I recall that there are a series of hypergates that are created for long range transport and that the aliens themselves are cannablistic among other things.
It is not the Talosian Chronicles story by Ben Wilson but elements are similar. I recall similar elements by Monblade's Alderan chronicles but they don't fit either. It's also not the Dalahk series from David Weber either but again this type of story has elements from these.
Enough of it ring a bell for anyone?