You can easily debunk rumor lists by how safe they are or how delusional.
SAFE ASS BETS:
+ Any combo of Pokémon, Fire Emblem, Bayonetta 3, or Metroid Prime 4
+ Luigi's Mansion 3. Dark Moon sold nearly six million, of course they're gonna make another one.
+ Animal Crossing. See above but double the numbers
+ *insert old ass port*
STUFF THAT WILL NEVER HAPPEN
+ FFXV
+Any western AAA game hitting at the same time as PS4/Xbone
+ A new good Paper Mario
MAN LEAKS
+Labo tier out of the box thinking
+New IP with a distinct suffice summary
+Obvious yet also invokes "How did we not guess that?" ala LA 3DS (may be completely false but it falls under this category)
SAFE ASS BETS:
+ Any combo of Pokémon, Fire Emblem, Bayonetta 3, or Metroid Prime 4
+ Luigi's Mansion 3. Dark Moon sold nearly six million, of course they're gonna make another one.
+ Animal Crossing. See above but double the numbers
+ *insert old ass port*
STUFF THAT WILL NEVER HAPPEN
+ FFXV
+Any western AAA game hitting at the same time as PS4/Xbone
+ A new good Paper Mario
MAN LEAKS
+Labo tier out of the box thinking
+New IP with a distinct suffice summary
+Obvious yet also invokes "How did we not guess that?" ala LA 3DS (may be completely false but it falls under this category)