User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-4118072-20120326181125/@comment-4118072-20120326183232

An idea I have regarding the relays is that it depends on your choices and your Galactic readiness. So for example the decisions you’ve made could still lead to the catalyst scene, but if the GA is at maximum the relays won’t blow up. But if it’s really low or even a choice you have made (like the synthetic rachni queen if you killed the one in ME1) they will. Of course you can also point the EDI and the geth out to the catalyst.