Of course, it's a joke! Although, I like the idea of a champion-mega-ent much more than the idea of a champion-ent :). And I've already expressed my opinion about the giant peaceful insect.
Nothing is known about the elves yet, but this is the most likely option. And we hope that it will be them :).
Phoenixes are neutral creatures, and they don't really fit with the elves :(.
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