Thanks to AAPF we now know the full gym leader roster (supposing there are no version exclusives that haven’t been revealed):

• Cheren
• Homika
• Shizui
• Burgh
• Elesa
• Skyla
• Clay
• Drayden

<;3 pokejungle

ps- BulbaNews is listing a difference in type effectiveness (Ghost is no longer resistant to Bug), but I highly suspect this to be a typo.