He may show up in Hero Academy too, based on the early accidental version of that we saw in Beta.
Heroes rotating through Atlantis are on a forward-moving cycle, meaning Gravemaker isn’t expected to show up there again.
That doesn’t mean Tavern of Legends is the only place he’ll show up in the future.
It’s a new event, with a Quest and Summon Portal.
You can read about it here: 🧪 Early Information on Tavern of Legends Event [Part of The Beta Beat v29]