I don't think they want the same headliners as Nova Rock.
FIR - sold out the Prague show easily, but I am sure they are aware how they are problematic...
RA - they can headline in Germany, but not in CZ
BFMV - might be announced after their February show? But I don't think that they will have another "heavy" headliner.
Are there any non-metal headliners around? Kings of Leon, Sex Pistols, Aurora, Roxette 😅, Girl In Red, King Gizzard,...