This is the interesting one. I wonder if they will be anywhere close to the guess they have presumably made on take up of expansions. There are a lot of people on the forums who are basically saying that FD should concentrate on finishing the stuff they have already released (with functional gaps, bugs, etc) rather than release new content. FD clearly have been chasing the money of late, however, so lots of people expect them to be releasing planetary landings this year, to chase more of that money. The question is, how many will decide not to by the expansion because the core game is so incomplete? Would they actually sell more by doing that core stuff first? NOne of us know, of course, but I would be fascinated to know what assumptions they are working under.