Production Weekly are reporting the as yet untitled Cassian Andor series for Disney+ will start production in October. This would suggest that we’re unlikely to see the series until sometime next year (2020).
— DiscussingFilm (@DiscussingFilm) December 31, 2018
Production Weekly are a reputable source of information, providing professionals working in the film and television industries with the most comprehensive production breakdown available. However, this isn’t considered official until we hear this news directly from Lucasfilm or Disney — stay tuned!