Battlefront III was cancelled way back in 2008, in October somewhere.
'Star Wars: Battlefront 3' Cancelled As It Was Too Expensive To Make, Says Insider. A third Star Wars: Battlefront game was binned because Electronic Arts argued that the project (and, most pertinently, the license) would have been too expensive to follow through with.
It was announced on January 25 that Respawn Entertainment would be developing three new Star Wars titles and alongside this news, VentureBeat's Jeff Grubb reported that “Battlefront 3 isn't happening.”
In simplified terms George Lucas and the Star Wars team thought it Battlefront III was two expensive to make.
If you want to know a bit more about it check it out on Fandom or check this website out: https://www.gamingbible.co.uk/news/star-wars-battlefront-3-cancelled-as-it-was-too-expensive-to-make-20211120
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