Harry Potter: Hogwarts Mystery, like some other mobile games, has an "insiders" program where select people get to test out features prior to launch or provide feedback directly to the development team. Reddit user calidrac is apparently one of those individuals, and they have posted a screenshot of a survey sent by Jam City that may reveal some features that are in the works for the game.
The survey asks Harry Potter: Hogwarts Mystery players how interested they are in features that Jam City "may or may not create." The features listed include Career Development/Internships, Magical Creatures, Dating, Quidditch, and Interacting with Students from Other Wizarding Schools. Out of those, it seems the two features that may be of most interest to Hogwarts Mystery fans are Dating and Quidditch.
Dating, or just general romance options, have been promised for the game since launch, but has yet to be added. Dialogue in Year 3 heavily suggested that Year 4 would be when dating was added to the game, but we still have yet to see the feature be implemented. While some may have given up hope that dating will ever make its way to Hogwarts Mystery, this survey proves that Jam City is at least considering the feature if it hasn't already started work on it.
The suggestion that Quidditch could be added to the game is also interesting. Quidditch is a wizarding sport played on a broom, and if it's added to Hogwarts Mystery, it will be interesting to see how exactly the developers implement it. It's possible that Quidditch would be like many other things in the game, in that it would just consist of players tapping on highlighted objects, though it could potentially open the door for a more interactive mini-game for players to engage with.
Quidditch may also be similar to duels, in that actions are governed by a rock-paper-scissors system to determine who wins. To that end, Quidditch could be another way for Jam City to add PvP elements to the game, but that's just speculation at this time. It's possible Quidditch won't be added to the game at all, so fans should keep their expectations in check.
In the meantime, it will be interesting to see if anything comes about from the other possible features listed by Jam City. Magical Creatures are technically already in the game, though their mention here makes it seem like they could have an expanded role in the future, perhaps as pets. Career Development, meanwhile, seems like a way for Jam City to extend the gameplay beyond Year 7 and follow the player character as an adult, but again, that's just speculation at this time.
Harry Potter: Hogwarts Mystery is out now for iOS and Android mobile devices.