Microsoft have filed a little trademark for the name 'FORZAVISTA' of late. However, the wording of the trademark application suggests that it might not refer to a complete game, but rather a new feature of sorts.
Picked up by Siliconera, the trademark paperwork indicates that FORZAVISTA is "a feature of interactive video game software which allows players to obtain statistical information of internal and external features of a vehicle and to virtually navigate and operate those vehicles."
By way of comparison, the trademark for Forza Motorsport describes "computer programs, namely, game software for use on computers and video game players."
Remember too that Forza 4's car porn mode, in which you could lovingly caress vehicles in the game with your eyes and dynamic cameras, was titled 'Autovista'. That mode also allowed you to get in and out of the car, rev the engine, check out some basic stats, and listen to the drooling tones of Jeremy Clarkson waxing lyrical about the machine at hand.
With a new Forza title heavily tipped to make an appearance at Microsoft's event tomorrow, we're sure we won't have long to wait for more info.