From the big 3 here are my Huber "Got to believe" picks that have no hint of showing themselves at the moment.
Sony - AAA First party crossover game. With Ratchet, Jac, Sly and many other popular characters on the back burner a cross over is a great way to get tons of interest and bring something new.
Old Rare property comes back. Battletoads is my first pick but Jet Force Gemini could be a winner as it could be a technical powerhouse to show of the Scorpio.
StarTropics revival. Heard it as a crazy prediction at the Switch presentation and have been sold on the idea to this day.