Friend system will be added. Lobby will be bigger. New map is coming (https://twitter.com/AmongUsGame/status/1329154673022996481). Cross-play support is already in the game.
They said these here:
- https://innersloth.itch.io/among-us/devlog/192737/small-patch-and-small-roadmap
- https://innersloth.itch.io/among-us/devlog/181107/the-future-of-among-us
- https://innersloth.itch.io/among-us/devlog/171026/among-us-2