I got an email from Free League a few days ago announcing their 2023 line-up, and there was nothing for the Alien RPG listed on there.
Granted they said there would still be more announcements this year, but given that Heart of Darkness came out in PDF form a year ago now and we've still not had any official announcements of what's next (most likely that colonist/explorer sourcebook "Building Better Worlds"), I get the feeling we might be entering a bit of a lean time when it comes to new content here.