These movies are going to be a serious take on Godzilla and Mechagodzilla and Gigan are associated with the cheesier movies.
Not entirely. The Heisei-era Godzilla vs. Mechagodzilla II
is one of the most serious and thoughtful installments of that era. (Sure, it has Baby Godzilla, but handled far better than in the Showa era or the dismal GvMG2 sequel Godzilla vs. SpaceGodzilla
, and used as commentary on themes of animal rights and the like.)