「 ✦ 𝐼𝑟𝑒𝑛𝑒 ✦ 」

Besides the predominant colors being similar, both places share at least similar characteristics.

A hidden place filled with many gems and precious stones, with a large bioluminescent yellow stone at its center.

Despite the many differences between the two places, it's easy to compare them, especially considering that the Hidden World was only recently inhabited by dragons in HTTYD. While the Troll Market is a region long inhabited by self-aware creatures with mining and construction techniques that may have greatly altered the place. (in addition to natural phenomena altering the geography of the area over time).

In the first HTTYD movie, while Gobber was talking to Stoick, Gobber says he believes in the existence of Trolls and that they steal socks. (YES GOBBER, THEY STEAL, THEY LOVE SOCKS).

In 'Wizards' we saw the appearance of a dragon. "But it's a talking dragon, dragons in HTTYD don't talk." Shut up! In the How to Train Your Dragon comics, Hiccup has telepathic communication with the Foreverwings, And girl, the dragon from Wizards is a magical dragon, it does what it wants.

OOh, that's not enough for you? Okay. During the final episodes of Wizards, we see Douxie freeing the creatures imprisoned in the dungeons. If you pause the scene on one of the cells that are being opened, you can see a trio of Smothering Smokebreath trapped inside.