Details as to just what the image represents for the future Infiniti range are non-existent at this point, but the form of the car does lend itself to some educated guesses. While the detailing of the large grille, headlights and kinked rear-quarter glass all follow current Infiniti styling conventions, the proportions of the design raise our eyebrows a bit.
As you can see, there's an awful lot of wheelbase stretched between those exaggerated wheels, and quite a bit of real estate between the front axle and the dash, as well. Both those things point strongly at a "flagship" car to sit at the top of the model line. Currently, Infiniti's M range (soon to be renamed Q70) resides at the top of the brand's portfolio; as the fourth generation of that car was introduced for the 2011 model year, a clean-sheet redesign seems unlikely.
That just leaves us with the idea of a long-wished for replacement for the company's old Q range, last seen in North America as the Q45, and with many reports calling it dead forever. A fullsize luxury player certainly makes sense in the context of the image here, and a sexy one at that. As for its name? Infiniti's all-Q structure would seemingly peg a range-topping sedan as either a Q80 or a Q90, depending fully on whether or not the brand wished to reserve the Q80 moniker for a Q70 (that's the M, remember?) based coupe/convertible product.