The release date of Dragon 4 has not been confirmed yet because Dragon 4 is in Jiangnan and Jiangnan is currently busy with other affairs, so the release date of Dragon 4 has not been confirmed yet. However, Gangnam usually releases the outline and some chapters of the novel within a few months after the completion of the writing, so we can expect Gangnam to release the official version of Dragon 4 at some time in the future.
There is no exact date for Dragon 3 to be published yet, but writing has already begun and it is expected to be published in the next few years. Gangnam had already made it clear that Dragon 3 would be published in 2023. However, the specific publication time still needed to be confirmed by Jiangnan and the publishing house.
The number of physical books for Dragon 4 is still unknown because neither the author nor the publishing company has revealed a specific number. However, based on the reputation and popularity of the Dragon series in the publishing world, it was estimated that the number of physical books of Dragon 4 might be more abundant. Some publishing companies have already started pre-ordering the physical book of Dragon 4 and some readers have already expressed that they will buy the physical book as a collection. So we might see more physical books of Dragon 4 published in the next few years.
The release date of Dragon 3 has not yet been determined because Jiangnan has repeatedly expressed that it will postpone the release of Dragon 3 indefinitely in the past few years. The latest revelation was in May 2019. Jiangnan had said that Dragon 3 would be published in the next five years but did not set a specific date.
Therefore, the exact release date of Dragon 3 is still unknown. It may be finally released at some time in the future or it may be postponed indefinitely.
A 'godlike Naruto dragon release fanfiction' could be about Naruto having some sort of god - like powers related to the dragon release. It might involve Naruto being able to control dragon - like elements in a much more powerful way than in the original series, like creating huge dragon - shaped attacks or using dragon - themed jutsus that are incredibly strong.