Update 3 will be out shortly -- hopefully this month -- and (A)-Base-(D)-Landing will be released along side this. This book will have a number of rules moved from elsewhere and as a result, I'm going to make it pay what you want initially to give everyone a chance to buy it to ensure that they get the rules that were initially published in another supplement.
Absent Without will be a full supplement that covers the Directions era starting in 2100. What happens in the directions era is going to be determined by which futures get completed: will your Directions era be an Exodus era, a Breakthrough era, a Singularity era, a Terraforming era or an Earthside era -- or a mix of many of them. It's going to be a little ways away, as I may end up making it an "expandalone" (but will probably require you buy A Facility with Words as well)-- it'll cover exploring big dumb objects, terraformed planets, Dyson swarm elements and generally feel more like a traditional TTRPG. I think it's going to take a while for me to write it.
"The year is 2100 and you have lost control."
I'm also starting to think about a couple of other supplements Colony: Subtitle, which will cover building large colonies and undersea exploration -- it'll also have an alternative future where humanity never goes to space and instead explores the seas; and All Terras are My Own, which will cover terraforming in more detail.