I'm surprised that no one has posted this, the LS rendering I bought from a Mag-X issue back in April and solely provided to the administrator of a Lexus blog, which was "grabbed" by other news websites and reposted elsewhere without directly referencing me
(yes that may sound petty, but it was very difficult to get) nor credit for the detailed timeline I have provided in regards to its development programme.
Mag-X doesn't allow non-residents of Japan to become members of their site, so I did have to jump through several hoops to figure out what information pertained to "レクサス LS" being "revealed" and pay someone with a Japanese address.
Anyway this is it (subsequent copy from Mag-X), as the spy photos even align with it. It is definitely what it looks like without camouflage. Mag-X got it right with predicting the current generation in the summer of 2004 and leaked actual photos of it in 2005, before its January 2006 NAIAS debut.
August 2004 XF40 LS Mag-X Rendering.
August 2005 Mag-X Leak of 2007(MY) Lexus LS 460
November 2005 Photoshoot of 2007(MY) LS 460 LWB - Press Release 2006/01/08
They have trademarked "LS350" in domestic Japan, which makes me wonder whether they changing their nomenclature for forced induction vehicles or transplanting their aging 2GR-FSE 3.5 6 cylinder into the LS a year from now, for at least JDM.
Two years ago in the autumn of 2014, LS prototype(s) (wearing final design) was/were shown to UK audiences of senior Lexus/Toyota personnel with 3.0 litre twin-turbo V6 engines. Lexus Europe head (Alain Uyettenhoven) was shown both the final car and finalised LC500 coupe before that in the summer of 2014. The LF-FC Concept has relation to the next LS, but it is a subsequent development developed between September 2014 and September 2015 at Toyota's Tokyo design studios.
It seems many news sites cannot get the narrative right, in which like the BMW VFL and Audi Prologue, the LF-FC was developed later. Plus the fact some outlets wrongfully claim Lexus replace their V8 with a 4-cylinder or a V6, which is just obtuse reporting (LS500, LS500h trademarks say otherwise). The same nonsense one heard in 2009-10 about the W222 doing away with diesel and petrol offerings for a hybrid only line-up.
The 2018(MY) LS I have learned, went into development sometime in 2010, but was already on the table in early 2008, but likely shelved until 2010.
Test mules of the LS500 have been rumoured to be running the past 4 years. The first prototypes were built in 2015, after the 2014 design sign-off.
Parallel to that, the current facelift of the LS (September 2012 to present) was designed in 2010, conveniently being finalised well before the March 2011 Japanese natural disasters.
A Jaguar customer, who posts on some forums, was shown the car a few months ago. He reports it does not look identical to LF-FC, the way the LF-LC and LC500 do. He claims it is much better looking than the LF-FC concept and the interior design language is close to the LC500, which it will use the same modular GA-L architecture.
While I think the artist respond did an atrocious job, the boot/trunk rear area has degree of accuracy, in regards to the taillights. Everything else, C-Pillar forward is pure ****.
As you can see, even me having been more professionally involved with the competition, I am very curious about what they are up to. This is considering that they have been the only non-European automotive corporation (more specially Asian/Japanese) that truly throws money at their best and takes the flagship class seriously. Nissan and Honda have not (and no, the GT-R and NSX don't count), as seen by the Q45 (Q80 is coming too late) and Honda Legend/Acura RL(X).
Once MB shows their hand with S and BMW with the 7er, I get very bored quickly.