Honestly I don't know. The netries for Šumava and ERC Historic Vltava are closed now however the seeded lists have not yet been published. Anyway in the modern event it's 18 R5, 2 WRC, 3 S2000, 6 GT or 15 R2 cars. The main contenders are for sure Kopecký, Pech, Lukyanuk. There is number of other foreign drivers like Nordgren or not that fast von Thurn und Taxis. Also some of them in 2WD class.

Spectacular video from Kopná!
https://www.youtube.com/watch?v=hvl7Q-DMH54