A hat trick in a group stage match is going to have a big bearing on this.
2010 there was a four way tie on 5 Goals.
2006 Klose won it with 5.
2002 Fat Ronaldo won it with 8.
1998 Suker with 6.
1994 two way tie with 6 goals.
1990 Schillachi with 6 goals.
1986 Lineker with 6.
1982 Rossi with 6.
Tournaments before that were, 6,7,10,9,4,13,11.
So if we take the last 8 tournaments, it looks like 6 goals would be in the mix. 4 in the group stages and then a couple more along the way would do it.
I like Argentina for the tournament, but wont be going for the obvious one in Messi. Who is the likely starter as an out and out striker for them? Higuain? 36 appearances and 21 goals. 4 goals at the last world cup, 9 goals in qualification.