Solar Opposites producer Sydney Ryan explains why the Justin Roiland recast changed the voice of a key character. The animated show, which focuses on a family of aliens who are forced to stay on Earth after a crash landing, went through a big change heading into season 4, as co-creator and star Roiland was removed from Solar Opposites after a felony domestic abuse charge became public knowledge. Dan Stevens, known for his roles in Downton Abbey and Legion, was soon confirmed to replace Roiland as the voice of Korv. The character's voice changed along with the recast, as Korvo now speaks with a regal British accent.

https://screenrant.com/solar-opposites-justin-roiland-korvo-recast-explained-producer/