Pocket Pair released their Future Updates Road Map for Palworld via their Official Discord and X Accounts! Many updates have been slated including 2 different types of PvP (one for players, and a Pal Exclusive Arena), New Pals, Post Game Raid Bosses, multiple bug fixes, as well as new Islands and Technology!
Palworld Server Transfers and Migrations
Palworld currently does not allow the direct transfer of single-player characters to multiplayer servers. You can only do so when playing as a Host, where you will be able to switch between single-player and multiplayer.
This allows you to keep your progress from single-player, while being able to invite others to play in your world. However, with modes like raids and PvP, it could be possible that players can progress on an easier world in order to efficiently build for future meta.