@LukeAlmighty @Mr_NutterButter metroid other m was in 2010
then you had a 7 year gap until metroid 2 remake. then another 4 until dread, 2 until mp1 remaster, hopefully mp4 this year. so that's a decent time between mainline games but overall not too shabby.
star fox zero came out in 2016. bone dry ever since. break's metroid's absent spell. 9 years. on top of that, star fox zero was both a rehash of 64 and a
none are as bad as f-zero though. f-zero's last game was in 2004. and no, f-zero 99 does not count.