Some inside the company thought a new car couldn't be justified given that the company sells around 20,000 XJs annually, a drop in the ocean compared to the 125,000 or so S-Class models that Mercedes-Benz found buyers for in 2015.
Others pushed for a super-luxury SUV to take the XJ's place in the range. In the end, the success of the S-Class and the argument that the brand needed an "indulgent car" to serve as its halo vehicle won out.
Above: The current-generation Jaguar XJ
It's understood that the next-generation XJ will use a modified version of the aluminium D7a or iQ-Al platform that underpins the XE, XF and F-Pace. For the XJ, the aluminium structure will be augmented with carbonfibre to help shed even more kilos and improve rigidity.
Motivation will reportedly come courtesy of a plug-in hybrid drivetrain that utilises the Ingenium V6 engine that's current under development at Jaguar Land Rover.
The next-generation XJ will also debut a new design direction for the luxury brand. The company is said to be working on a radical interior design concept and autonomous driving technology for the car.
If all goes according to plan, the company will show off a preview concept in 2018 and follow that up with the XJ's global debut in 2019.