User blog comment:JakeNBake/Godzilla solo film?/@comment-3542924-20150109030735

According to The Return of Godzilla special effects director, Teruyoshi Nakano, Japanese society was gradually forgetting about how horrible, painful and scary nuclear weapons were, perhaps it is the reason why The Return of Godzilla was to be a solo Godzilla film, like the original Godzilla film.

I would say another Godzilla-by-himself film is not a horrible idea, as long as they deliver the message about nuclear weapons, and this only needs to happen if Japan ever forgets about the horrors of nuclear weapons again.

I got this information from a SciFi Japan interview with Teruyoshi Nakano. If anyone wants to see and learn from it, you can find it on the bottom of this comment.