More likely they'll either scrap the entire 2.0 relic questline for Heavensward or come out with an entirely new one for the expansion while still offering an upgrade path for those that did the 2.0 version (like FFXI did).

This allows players that did the original questline to be able to keep upgrading their current relic while new players will start off on even footing with the start of the new 3.0 relic questline.