This arc is going to be a repeat of the tragedy of Ohara, IMO.
Most of Vegapunk's tech and island gets destroyed, but one Punk makes it out with the data to save the world (mirroring Robin's ability to read Ponyglyphs changing the world).
Egghead is the Ohara of the modern age, about to be destroyed by Cipher Pol. However, some light will remain. I'm betting on Lilith, but, I really want Shaka to make it out, too.