u/KrishMortyJunior

The evidence is that there's concept art for Super Villain Island which depicts a robot that combines aspects of the island's main villains. The sombrero on the robot seems to hint at El Mustachio Grande. Also, a Daily Pop from around the time of the island's release asks players about who their favourite Poptropica villain is, and among the options is El Mustachio Grande. That's weird, since he's not one of Poptropica's most popular villains like the other options are. Lastly, a sneak-peak picture shows five containment chambers in Dr. Jupiter's lab instead of four, even though we only go to the dreams of four villains during the main story of the island (excluding the bonus quest).

Credit to Poptropica Help Blog for this interesting subject: https://poptropi.ca/2014/05/05/the-missing-link-the-5th-super-villain/

Both Nura and Ellie are pessimistic minimum-wage workers who relate to having higher ambitions that they can't achieve due to financial struggles. Dunia and Gabby are both optimistic people with very outgoing personalities. The difference is, Gabby was heavily ostracized at first, whilst Dunia could presumably always connect with many people.

It's obvious that the final two of DC5 will be one fan and one favourite. Imagine if it's Evie and Benji. The common theme is them doing nothing and staying in the sidelines. Plus, they aren't threatening, so people would be voting out more competent players instead. 😭