Two next-generation Lexus ES prototypes have been spotted in the California desert testing against the Mercedes E300 and Audi A6 — Motor1 has photos of what looks to be both an ES and ES F SPORT (above):

Both sedans have a coupe-like silhouette, much like the all-new fifth-generation LS — the standard ES with a waterfall grille, the other with an F SPORT mesh.

From the side, there are some obvious curves in both fenders, and the trunk lines are reminiscent of the current GS sedan.

With the straight rear, you would almost think this was a third-generation GS in the way the trunk and bumper come together. The sides look undefined from this angle, but it’s worth pointing out that the wheels are finally pushed out to the corners.

There’s a lot to take in — does this prototype signal the end of the GS? Could the ES really be getting an F SPORT edition? Is the car bigger, or is it the same size? Let us know in the comments, and let’s get to discussing.