>It's possible that the Return wasn't an option for anybody without a
>suitable body being available, and that with most of the remaining Fog
>ships in mothballs, there wasn't any way to make one. Not like
>anybody on Earth was going to duplicate a Union Core and throw it into
>a few thousand tons of nanomaterial.

Mmm, hadn't thought about that one, mainly because Asgard isn't usually limited by capability, it's usually politics. But this could indeed have been triggered by Corwin's report to Asgard including the Union Cores.

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Fearless creatures, we all learn to fight the Reaper
Can't defeat Her, so instead I'll have to be Her