Actually, (they even stated this, and it was also obvious) they did the even the first time to advertise the game when it launched in Japan and the second time to advertise the game when it launched internationally. Similarly, there was some event in FFXIII:LR were you can get a Mi'qote costume (the racial clothes) for the effect of advertising FFXIV since the during the International release, it was close to the launch of FFXIV on PS4. The only chance for this event to be offered again is to again advertize the launch of the game (which means that if it's not near the PC release, then it's not coming again). That being said, they don't do this for all of their games (e.g. Type Zero) so I wouldn't expect things from FFXV or KH3. Although most people don't remember, but they also did a Dragon Quest event for the same reason around the same period.