So I somehow missed that several years ago around 2015, James S. A. Corey authors of The Expanse books had made a few Andy Weir/The Martian references in their books and then Weir and Corey had jokingly agreed that the two books were set in the same universe.
https://x.com/JamesSACorey/status/650382119449964544
A lot of people took this as canon until slightly more recently around 2018, Weir clarified they were all definitely joking.
Now I noticed a few The Expanse related things on various pages, I think it would make more sense to add The Expanse stuff to either it's own page about crossover references and possibilities rather than add information about the Expanse to pages where it would otherwise be relevant, for example the timeline page
https://the-martian.fandom.com/wiki/Timeline
Which has this reference at the bottom of the timeline: 2214: Solomon Epstein invents a revolutionary new Fusion Drive offering unparalleled performance.
Anyone have any thoughts on this? Best to just make a new page and get rid of any other mentions? Any other suggestions on the best way to include it?