I would hold out on stating he has any kind of input. His title screams contract obligation to me.
No offense to the man, get that money, but I really think we should all refrain from praising his return just yet because I feel its more likely his position is honorary and more in title than in usefulness.
I'm more of the opinion he got bored and missed his baby and wanted to contribute again, and since he 100% still had friends at Blizzard they probably talked to him about ideas and where they wanted to take things, in an unofficial capacity, where he surely would have thrown around opinions and suggestions like anyone would in such a conversation.
Also Taliesin has said that people he knows at Blizz have told him about Metzen's level of involvement so far and dude is definitely working with the team and not just sitting at a desk with a shiny new nameplate twiddling his thumbs and cashing cheques. He is too passionate about Warcraft to not be involved.
My prediction...
Is that we are going to get a real leak Monday-Thursday, and brush it off as fake because of the silly Avaloren ones.
True. No one will expect World of Warcraft: Titanic Pizzeria til the official announcement.
https://i.imgur.com/H36DllG.png
Well, there is one possibility, but it's a real stretch in the suspension of disbelief.
See, the Orcs were a race descendant from a lineage of creations known as the Grond. The Grond were created specifically in mind to get rid of the Everbloom, a ravaging botanical hivemind that would consume Draenor in endless trees and even destroy all live on the planet. The Grond were created by the Tita, Aggramar, who saw Draenor as sort of a pet project that he left unchecked.
But BEFORE all that, It was also Aggramar who was the first discover Azeroth when it was still corrupted by the Old Gods, and it was both through him and Eonar that the two convinced the Pantheon to actually look into un-corrupting Azeroth.
So there is a small- SMALL chance that this supposed Orc-like race might've been some of Aggramar's handiwork.
But that's just one theory.