Omega is... probably not going to be fought before the expansion. It took a lot of work to get Ultima Weapon working, so I doubt Omega Weapon will work right out of the box either. If anything, Adeledji is going to screw up royally and the Omega Weapon will be seized by some other party. Alternately, his plan all along may amount to selling it to the highest bidder, perhaps even Garlemald.