The sprint race I really want to see is on a flooded track with everyone on inters. The teams would never go for it because it would cost them too much in parts but as fans it would create a pile of fun chaos to watch.
The ultimate would be all the drivers partake in the Monaco Historique. Seeing these guys in old cars would be great fun. Even if they just took part in the last race in 80s or 90s era F1 cars would be enough but I’d mostly want them in older generations.