Not exactly XV related but some Luminous Productions devs are going to be doing a presentation at CEDEC 2019 regarding High End character graphics in Luminous Engine by showing what their current level of character expression is in the engine, and will also tackle the subject of Uncanny Valley in realistic character CG.
http://cedec.cesa.or.jp/2019/session/detail/s5c9db9bda6233
And a second presentation regarding logging and testing for large scale development, specifically in regards to addressing the issues of increasing cost of QA and Debugging.
http://cedec.cesa.or.jp/2019/session/detail/s5c997640a2932
Nothing too big but interesting nonetheless that they are doing these presentations regarding high end graphics and large scale development, they also did presentations in previous years and also in the years leading up to XV's release regarding the tech the game was using, so I think some of what they talk about or show in these presentations will be going towards LP's new AAA IP. I kinda feel like they are now working towards a 2020 reveal for the game, since FF7R part 1 will be out by E3 next year and no other big AAA game from SE has been announced yet, they could even do a trifecta of revealing FF7R part 2, FFXVI and LP's new AAA IP at E3 next year.