I'll refer to the Betmoose and say it is at least 4 goals
Honestly I see it perhaps at 3-2
Brazil win or they would break a tradition
The host nation has never lost their opening World Cup game, with the 20 previous hosts winning 14 and drawing six of their openers.
Guess I'll throw the bet link for those who want to bet their opinion with BTC ha-ha
https://www.betmoose.com/bet/total-goals-scored--brazil-v-croatia
And some stats
http://www.dailymail.co.uk/sport/worldcup2014/article-2655415/Brazil-v-Croatia-match-preview-All-stats-facts-team-news-Group-A-opener.html
That bet would have been a loss
Beautiful undisputed goal by Brazil now so this settles at 3-1
Tssk I predicted 3-2
If that Croatia goal was on I would have won my prediction xd
Edit that's game
All 4 goals Credited to Brazil XD