forget it it's not true
first of all the game would be displayed in Japanese first, like rom #171 or something was golden sun and that was released yeaaaaaars later the jap release
second of all, the title screen re-uses art from the second game. I'm pretty sure all the GS games from the past used new art every time
third, the images can easily be made through comic book DS. It isn't hard.
Anything can happen, but those logical explanations should convince you that this can't be true, and these pictures are fake.