Member title of "17 brain cells" oddly appropriate...
I forget if I ever posted in this thread, but the next F-Zero desperately needs a track creator. One of the GBA or DS games had it, so why not? We were teased about it back with F-Zero X and only Japan got that. There's a utility floating around that creates custom tracks for English F-Zero X ROMs, but I found it hard to use.
Since I don't think they can improve the game much in other areas (unless the machine creator parts were actually good enough to compare with the 30 regular machines), a track creator is what I want to see. As for other areas, the game is still impossible at higher difficulty levels and it will probably take years to beat every cup with every machine.
That is, it's near-impossible unless you snake.