Undefeated
Every Rugby World Cup winner has gone through the cup undefeated.
Meaning: New Zealand wins the cup
Lose one to win one
Winners tend to lose in the previous tournament's quarter-finals.
Meaning: New Zealand or Australia win the cup
History repeats
The semi-finalists are the same four teams as in 1987 when NZ won.
Meaning: It's New Zealand again
... Or does it?
The semi-finalists are the same but the matches are different: New Zealand played Wales and Australia played France last time.
Meaning: Allez les Bleus
The Kiwi factor
Three of the semi-finalists are coached by Kiwis.
Meaning: There's a very high chance there's something in it for Kiwi fans. But on the other hand, maybe the odd man out wins. France again.