A new format for the 2018 European League: source. CEV now introduce two tiers - Golden League and Silver League. The two finalists of the Golden League will, unless FIVB decide otherwise again, play in the FIVB Challenger Cup alongside 4 other confederation representatives for a spot or the right to challenge (I don't know, it doesn't say) the weakest 2018 Volleyball Nations League challenger (one among Australia, Bulgaria, Canada, South Korea).
Golden League
Pool A
Belgium
Estonia
Slovakia
Sweden
Pool B
Slovenia
Netherlands
Turkey
Ukraine
Pool C
Finland
Czech Republic
Portugal
Spain
Finals will be held in Karlovy Vary, Czech Rep.
Silver League
Pool A
FYR of Macedonia
Latvia
Austria
Kosovo
Pool B
Belarus
Croatia
Hungary
Albania
Finals will be held in Skopje, FYR of Macedonia.