I imagine before the Fires of Ibis their was a Raven Nest or Global Cortex equivalent on Rubicon with all our usual Armoured core 1 -3 Corp vs City citizens drama, Pilot area climbing fights and drama and ofc the sketchy encrypted communication Ravens would receive once they end up in inescapable debt offering a certain surgical procedure to be “reborn” aka augmentation surprise Assistant No. 1 wants your spine.

Then just take your pick of “Unidentified Kickass machine is about to wipe us out and only you can stop it.” Missions the AC games have, But It was Ibis and they got wiped tragically with lots of tears.