In the Twilight Oasis fractal, we get to see (well, participate in) Amala's death and subsequent Awakening. During the fight, Amala transforms into a number of Dervish forms and in most cases, uses the old Dervish elite-forms we knew and loved in GW1. Except for 2: Grenth and Melandru. I don't care much about Grenth's just being GW2 armor skins (though, I would've loved to see the old Grenth Dervish elite-form again!), but the Melandru form is a Sylvari.
Amala was slain and Awakened in or around 1175 AE.
The first Sylvari didn't appear in Tyria until 1302 AE.
I have the perfect solution to this, though: Make the original Melandru elite-form a gemstore costume (like Lyssa, Dwayna, and Balthazar), release it for Earth Day with part of the proceeds going towards something green in nature (no pun intended), and (of course) re-costume Amala in the Melandru elite Dervish form since it'll be in the game. Oh, and gift me the skin for free for noticing your goof.
I'm mostly joking about that last part...mostly. >.>
Apologies to anyone who has noticed and posted about this. I only did a cursory search on the forums (which I admittedly don't use very often, so I may have missed it!).