Relics from 2.0 → 3.0 will probably take the same path as relics from 1.0 → 2.0.

Those who got their relics earlier will continue to be able to use theirs and can begin on the new upgrade quest immediately. Those just starting then, will get a condensed , expedited version up til around nexus or excaliber just like we got a condensed version for the relic.