Bluetracker
Tracks Blizzard employees across various accounts.
I just asked Mike Donais if Galakrond will be in the Arena
And this was his answer: "Good question, he works ok with zero build around cards actually so we could go either way on that".
And: "I am told they cant be discovered and not sure on arena"
Source: https://www.twitch.tv/melodyserafina This is his daughter's stream and Mike is in chat sometimes
Mike Donais
I am sure it has been talked about and decided but I am not in every conversation and it was Sunday so I couldn't check the data.