Octopath Traveler has come storming out of the gate with over a million copies sold. This is a huge achievement for a retro-themed JRPG that is exclusive to a fairly new system. The demand for physical copies of Octopath Traveler has been so high that retailers have been running out of stock all over the world.

To celebrate the success of Octopath Traveler, Square Enix has shared a piece of exclusive artwork on several different social media sites. Here is the image as it appears on Nintendo of Europe's Twitter page.

Fans of older Square Enix games have noticed something peculiar in the way that all of the characters are standing. It seems that Square has hidden a reference to one of their earlier Nintendo games in the design of this image.

The outline of the eight Octopath Traveler characters and the flag they are holding shares the same shape as Airy the Fairy from Bravely Default. This is what she looked like in one of the covers of the game.

via.FinalFantasyWikia

Here are the two images side-by-side.

via.FinalFantasyWikia/Twitter

So, what does this mean exactly? It's hardly a coincidence that the two shapes match up. It also seems that some of the Octopath Traveler cast members are standing in the same stance as Airy, most notably Primrose.

The most likely answer is that they teasing some new Bravely Default content on the Nintendo Switch. This would either take the form of HD remakes for the first two Bravely Default games, or the third game in the series coming to the Nintendo Switch.

This wouldn't be the first time that Square Enix has teased a Bravely Default game on the Switch, as they uploaded this image of Edea holding two Joy-Cons last December.

Square Enix showed a great deal of faith in Nintendo by giving them such an amazing exclusive during the tentative first year of the Switch's launch. Octopath Traveler was one of the first games revealed for the Nintendo Switch and it has proved to be a massive success for both Square and Nintendo, which means that more collaborations are likely to come in the future.

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It's possible that the picture of Edea above was just meant for fun and wasn't actually promoting any upcoming Bravely Default games for the Nintendo Switch, but the success of Octopath Traveler may have prompted the return of the series in the future.