Are there any groups of past legendary Pokémon that you'd like to see get new members?

I'd like to see new steeds for Calyrex. I believe it's current steeds are partially based on the 4 horsemen of the apocalypse. Glastrier is the white horse Conquest, and Spectrier is the Black horse Famine. Sort of like how they introduced Enamorus to make the genies properly represent the Four Auspicious Beasts, maybe they could introduce a new red horse for War and a Green horse for death to make them properly represent the horsemen