^ Because at the time the Source didn't know for certain that he would eventually be battling Darkseid - but the former was considered a possibility. That said, the Source chose to error on the side of safety and keep Orion 'on the ready' for such a confrontation (a tactic which ultimately paid off, big time.)
Originally posted by Prep-Man
With the versatility it has on it's side, I think it would. Or his Astro Force could simply be the deciding factor. I think the AF has more destructive power.
Yeah his use of the Astro Force > BRB's use of Stormbreaker's capabilites as opposed to Thor for example. Then again part of Mjolnir's power comes from Thor's "godly" force. It was clear in Secret Invasion BRB is below him. Orion should take a slight majority.