Endurance-Info also spoke recently about the 2024 grid (Hypercar and LMGT3). Unfortunately it requires to be a paid subscriber to read it: https://www.endurance-info.com/auto/article/108022-quoi-devrait-ressembler-la-grille-du-wec-2024

They said the grid will be limited to 36-37 cars and Imola only have 32 garages. So teams in GT3 will probably have only one garage (like it is the case in GTWC when they race at Imola). McLaren will probably be run by Inception according to EI and Mercedes by HRT. They also predict Manthey for Porsche but for sure it wasn’t done last time I spoke with someone from Manthey 1 month ago (personal info).