If the hype train has somehow eluded you, there’s the post about the considered feature:
Yay there’s a handful of pets, from Olympics pets to old RaF content that could find its way there.
But what’s more: There’s a possibility for pet battles to be a way of earning the currency, and this is what I’d like to ponder about, and leave suggestions. Apart from things already defined by the current in-game constraints, such as completion of quests/instances or levelling pets, what else could be required?
Both PvE and PvP content could see similar solutions such as “Win a battle with Alarm-O-Bot” and not just family fights. I imagine those not liking battles much could have something like “visit place Y with pet X”. But to recall the other things that have been suggested in the past, I am unable to at the moment.