the body kit i would like to see is the new duke dynamics mclaren 720 s body kit
This Duke Dynamics widebody kit is the basis for Daily Driven Exotics’ infamous McLaren 720 GTR build. The 720S Spider (just the Spider, idk why) already has Duke Dynamics branded longtail style aero parts for it, so there is a decent possibility we will see this full widebody added hopefully to both 720S Coupe and 720S Spider in the future, or as a body kit for the 750S whenever that gets added.
That is the Duke Dynamics kit. The likelihood of seeing new FH5 content is looking increasingly low, so I wouldn’t expect to see it until FH6.