The Russian MoD expects Almaz-Antey to complete development of the S-500 Prometheus air and missile defence system in 2021.
Looking further ahead, Deputy Defence Minister Alexey Krivoruchko told Russian military newspaper Krasnaya Zvezda in November 2020 that serial production of Prometheus is planned to begin in 2025.
According to Sergei Surovikin, Commander-in-Chief of the Russian Aerospace Forces, the main mission for the S-500 will be to destroy medium-range and intercontinental ballistic missiles in the terminal phase of flight, as well as space targets.
Destruction of stealth aircraft (such as the F-35), UAVs and hypersonic missiles travelling faster than Mach 5 is