>>724083175
>It fucks everything up because ultimately there is no real way to defeat something that is that hyped up.
You know you can just make the obvious choice and defeat their threat for the current generation but make it absolutely clear they can still easily fuck you up and will come back... eventually. But the day has been won and this generation of heroes went above and beyond to achieve it.
Mass Effect ripped the entire Reaper thing from Free Space but completely forgot how the Shivans work.
Lucifer-Sovereign is defeated at the very last moment and the contact with Earth is lost.
So human-alien alliance builds the biggest, baddest, most expensive and most uber-advanced ship ever built based on the bits of tech from Lucifer-Sovereign they could obtain. Just in case Shivans could ever come back.
And they're also researching how to restart the jump nodes (made by Shivans-Reapers to direct the evolution of all races before they come in and cleanse them using that hyperspace network as a guide for where intelligent life is), they end up opening a portal that gets them... to more Shivans-Reapers. They destroy the tech that restarted the portal, but it's useless. Shivans made this shit, they know how to through anyway. They bring in the giga-nigga uber ship and it does valiantly, but Shivan-Reapers bring in something even more powerful and the alliance only barely wins. But as they're celebrating, they find out there's more of these things which they barely won over. OH SHIT. Seeing there's no hope, they resort to the only trick that worked historically. It takes all the resources they have and lots of heroic sacrifices, but in the end they cut the invaded nodes from the hyperspace network and only observe something superbly odd as they hightail it out of there. The Shivans are unexplainably triggering a supernova and jumping into it. We don't know what they did, why they did it, only that for now, the war is over. We're saved, for now.