[neatoman]

Yeah... Because Star Fox 2 was initially cancelled, Star Fox 64 is itself a combined sort of remake of the two games. Then Star Fox 64 was remade for the 3DS with Zero being a semi-remake of 64 as well. That would mean Adventures, Assault, Command and the eventually released version of 2 are the only straight forward sequels in this franchise, and Command has such a convoluted set of contradictory paths and endings that it couldn't be fully canon had they decided to make another actual sequel.

Why Nintendo prefers filling this franchise with reboots instead of actual sequels is a mystery to me. In case anyone has heard the audio files from the early version of Adventures that was still after Dinosaur Planet started to get reworked into a Star Fox game but before the shift to Gamecube, you know that game too was seemingly going to have no connections to previous games either with yet another alternate take on the characters. Not sure who decided to make it a sequel to 64 but if they didn't, then the list of direct sequels would have been even shorter, if not non-existent.