Speaking to the Financial Times, Hanke also said that Niantic would be better prepared for the Harry Potter launch.
Pokemon Go was so popular that the servers struggled to keep up with demand.
There were also complaints about some of the real world locations that were used as PokeStops.
It had previously been reported last year that Niantic were building a game based in the world of Harry Potter, but that rumour was later squashed.
As part of the Pokemon Go Christmas event, fans will encounter additional water and ice-type Pokemon, as well as special Pikachus wearing Santa hats.
Players can also pick up a selection of item bundles from the in-game store. This includes the Winter Box, the Great Box and the Ultra Box.
Winter Boxes contain four Lucky Eggs, two Premium Raid Passes and five Star Pieces. Great Boxes feature two Super Incubators, eight Lucky Eggs, Premium Raid Passes and ten Star Pieces.
Ultra Boxes, meanwhile, contain six Super Incubators, 16 Lucky Eggs, ten Premium Raid Passes and 20 Star Pieces.