As teased by the studio, Housemarque is making Returnal DLC in the form of a free co-op update. It also will come with a survival mode
Returnal: Ascended co-op mode announced for March 22
Returnal Is Getting A Free Co-Op Campaign And Survival Mode
Returnal: Ascension launches today, brings campaign co-op and
Returnal's Ascension Update, Which Adds Co-Op And A New Challenge
Returnal
Returnal Ascension: 5 Things You Should Know About Co-Op
Returnal - PlayStation 5 - 21317586
Returnal - PlayStation 5 : : Video Games
Returnal Archives - One More Game