This city has a Fire-type Gym Leader, Kabu, and his ace is the final evolved form of Rolycoly (three stager, a level up evo and then either a trade or item evo).

Not even a leak masquerading as a guess its literally just a guess because it's pretty predictable. Don't think we'll get tons of Fire types and Gyms 1 and 2 are Grass and Water so yeah, above guess.