These two new trailers for Persona Q: Shadow of the Labyrinth include some of the dungeon-crawling, first-person combat along with some its party members from Persona 3 and Persona 4.
The first trailer for Persona Q: Shadow of the Labyrinth focuses on the game's randomized dungeon-crawling mechanics. You get to put together your party using various members of the SEES squad of Persona 3 and the Investigation Team from Persona 4 in order to stop a Shadow-filled labyrinth breaching into their world at a local festival. As you can tell by the combat, Persona Q has decided to take a first-person perspective in order to keep itself more akin to the Etrian Odyssey and original Shin Megami Tensei games.
The other trailer for Persona Q: Shadow of the Labyrinth focuses on the different difficulties the game has to offer, including the Safety, Easy, Normal, Hard and Risky modes. According to the trailer, you will be able to change the difficulty level whenever you'd like. Persona Q is due sometime for a Western release sometime this fall for Nintendo 3DS.