These MCU villains are still alive, and their big returns could be in the Avengers’ fight against Kang in Avengers: Secret Wars. From universal threats like Thanos to minor offenders like Justin Hammer, villains come and go from the MCU all the time. However, there is always the chance for them to reappear. Just like Darren Cross’s reintroduction as MODOK and Trevor Slattery’s Shang-Chi role, there’s always the chance for villains to return to the MCU.
https://screenrant.com/mcu-villains-kang-secret-wars-battle/