Firstly, here is how I want the world cup to go:
Quarterfinal 1: England beat Australia
Quarterfinal 2: South Africa beat Netherlands/Ireland
Quarterfinal 3: Pakistan beat India
Quarterfinal 4: Bangladesh beat New Zealand
Semifinal 1: England beat South Africa
Semifinal 2: Pakistan beat Bangladesh
Final: England beat Pakistan

I decided all this without considering the groups and obviously this isn't possible since South Africa, Ireland and Netherlands are in the same group. Thus, South Africa would beat Sri Lanka. I don't like Sri Lanka but too many minnows in quarters may make matches one-sided and thus, boring. In fact, in Group B, I only really like Pakistan and New Zealand. But at least, Australia is lively and has a great rivalry with England. Pakistan is far better than New Zealand because they have got more skills, passion and unpredictability. New Zealand is a side which has only shown potential for years and disappointed, their inferiority complex makes their cricket dull. I have no love for Canada, Kenya or Zimbabwe but at least I've no hatred for them. So I wouldn't mind if they crush Sri Lanka. Here's how teams need to stand in the group stage:
Group B
South Africa
England
Bangladesh
India
Group A
Pakistan
New Zealand
Australia
Canada/Sri Lanka

The reason for choosing Bangladesh as a semifinalist is that their players and fans are very enthusiastic. And the world cup is being held at their home too. They'll cherish every win. India will be humiliated to finish 4th in the group stage. Losing to arch rivals Pakistan, to whom they have never lost a world cup game, will be an icing on the cake.