We first reported on Rohan Mobile back in September 2018 about how it was coming to the mobile soon. Of course, it took much longer than we would have liked, but it would appear that the game may finally be out in June 2019.
South Korea will be getting the game first, with launches in Thailand and Taiwan to follow suit at a later date. There does not seem to be any announcements for a global launch, but it is probably too early to write it off just yet.
Little else is known about the game at this point in time, but it would appear that the developer is making attempts to make this game as close as possible to the original.