There are different editions of the games, i.e. Collector’s Edition(limited), a box DVD edition(limited), etc.
Creative Assembly has released several paid and free DLC packs for the game.
Cover is NOT Gotrek & Felix so the artist is not mentioned.
The duo is not mentioned in the back cover.
In the gallery below there are some Gotrek & Felix screenshots.
Total War : Warhammer II, Gotrek & Felix.Total War : Warhammer II, Gotrek & Felix in battle.Total War : Warhammer II, Gotrek & Felix in battle.Total War : Warhammer II, Gotrek & Felix in join-up.Total War : Warhammer II, Gotrek & Felix guide skills.Total War : Warhammer II, Gotrek & Felix leave faction.Total War : Warhammer II, Gotrek & Felix in multiplayer.Total War : Warhammer II, limited edition DVD box.Gotrek & Felix card from White Dwarf September 2019 issue for Total War 2 : Warhammer.White Dwarf September 2019, Gotrek & Felix for Total War : Warhammer II, taken from Warhammer Community presentation of the issue.Gotrek & Felix by Mateusz Michalski for the DLC of Warhammer : Total War II by SEGA.