So the Temporum expansion is supposed to release sometime this month (hopefully), and I took a look at the RGG page - it adds 48 new zones, and 60 new cards - that doubles both! It also mentions chits and cards for certain new zones (interesting!). What I'm mainly wondering is what the rules will be with playing with expansion cards - do you just play with all 120? Make that 180 if another expansion releases? Seems unwieldy. Or will the rules say to play with one set or the other? That could certainly add more variety.
As a disclaimer, I did play with GendoIkari's prototype of the expansion way back in 2015, but I don't remember anything about it, and had no idea which cards/zones were base and which were expansion at the time. I was just really confused the whole time.