"That was past Emet"
How would past Emet know the present state of affairs of the world when he was telling us to widen our horizons?
THAT was Emet in the present with all his memories restored. It was his half dead soul plucked out from the Aetherial Sea by Hydaelyn's magic, that she herself used to enchant Azem's stone. When in the dungeon in the Aetherial Sea, it was said that he was most likely around in there somewhere alluding that he existed in our time.
If his appearance confuses you, that's just how he looks. The Garlean body is not his true form, it was a flesh suit that he could use to manifest into the physical realm. So when he physically perished, his soul is going to represent his true visual identity.