Star Wars Battlefront II' Gets New Capital Supremacy Mode Next Week

The game mode is played in two phases and will feature new locations and reinforcement NPCs.

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ArtStation - Star Wars Battlefront II - Capital Supremacy

So from reading the Blog post and the Community Transmission, it does seem that these Concept Art pictures were foreshadowing the new Capital Supremacy mode on Geonosis. : r/StarWarsBattlefront

Capital Supremacy is Coming to Star Wars™ Battlefront™ II on March 26