What can we expect for Arsenal this season?

A pre season where our main man was sold to a big rival and the loss of another key man in Alex Song it was looking the same old story at The Emirates. To some this may have seemed another bad start would follow.
Three games into the premier league season and all things Arsenal are looking good from my point of view. Arsenal are yet to concede a goal and have 5 points on the board. This is in contrast to the this time last year where 10 goals were conceded and things were not looking good. But what has made this year so different?
A factor in this years start may be down to the squad. Arsenal have taken in Lukas Podolski an experienced German international, Santi Cazorla a double European Championship winner and Olivier Giroud a French international and joint top scorer in Ligue 1.
Santi Cazorla...