Hello Games teased its incoming update for No Man's Sky called "Beyond" that is planned for a summer release. In a blog post, Hello Games said it originally planned to release three large features and has instead now rolled them all into one expansion. We know that one is called No Man’s Sky Online. The newly revised online component is not a shift to an MMO but does allow players to meet up and play together easily.
Expanded No Man's Sky Online Mode Teased - GS News Update
No Man's Sky incoming expansion Beyond teases a newly revised Online Mode