New Reward Cars:

• 2022 Hyundai N Vision 74 - 80 points Series Reward
• 2021 Lamborghini Countach LPI 800-4 - 20 points in Summer (Week 1)
• 1986 BMW M635CSi - 20 points in Autumn (Week 2)
• 1980 Lotus Esprit Turbo - 20 points in Winter (Week 3)
• 1986 Citroën BX 4TC - 20 points in Spring (Week 4)

Monthly Rivals:

• Playa Azul Circuit in the 2021 Lamborghini Countach LPI 800-4
• Las Laderas in the 1980 Lotus Esprit Turbo
• Descansar Dorado Sprint in the 2020 Lotus Evija
• Los Jardines Circuit in the 2022 Hyundai N Vision 74

Misc:

• New Radio Station - Horizon Wave
• Evolving World
• Neon Highway
• Retrowave Drone Show
• Midnight at Horizon neon decorations
• Extended night cycle
• New Retrowave outfit
• Minecraft Creeper & Minecraft Enderman Helmets
• 3 New Badges
• 6 New Car Horns
• 28 New Horizon Retrowave EventLab props
• Bug fixes
• Fixed an issue where AI Traffic cars were not present in Street Races
• Fixed an issue where some players were getting "Forza Horizon Server Not Available" error message while trying to connect to the Auction House, Message Centre, Leaderboards or browse Liveries, Tunes and Vinyls
• Fixed an issue where players were not able to follow/unfollow creators via the Creative Hub
• Fixed an issue with the 2020 Audi TT RS where front fenders were disappearing when equipping the customized hood
• Series 35 Preview (next month) - Modern Horizons
• Highly Requested Car
• New Events
• New EventLab Props
• New Collectible

https://forza.net/news/forza-horizon-5-horizon-retrowave