According to DigitalTrends.com, after speaking with Lexus of Europe boss Alain Uyttenhoven, the all-new 2017 Lexus LS500 and LS600 will land next year. The Lexus LC500 production model is set to be shown in Detroit, and I highly doubt both cars will be shown at the same show, so I'd expect the LS to be shown in New York in April.
According to this information, the 5.0 V8 will make 465 HP, not much different from what it makes in the RCF, but hopefully, they can get more torque out of it. The hybrid will be V8/electric, not V6/electric, and make 535 HP, which makes some sense given they also say the future LSF sedan will be a turbo V8 making an even 600 HP. The hydrogen version comes a year later, and has a range of 239 miles (such an exact number also lends credence to the sources).
Also the TX full-size crossover is being rushed to market. Sounds like the reveal may come next year at this time and should hit dealers in early 2017. It is being described as "a second flagship" model.
Outside of a lack of torque in the V8, the LS looks like a winner, and 2016 looks like it will be a very big year for the top of the Lexus lineup.
http://www.digitaltrends.com/cars/2017-lexus-ls-hybrid-news-rumors-specs/
BD