According to IndyCar PR "The placement of the IZOD IndyCar Series and Honda logo on the FAZZT car illustrates how it will be on all cars this season"
So, with the addition of IZOD as the title sponsor, the series logo will replace the Honda logo. You may have also noticed a difference in the logos shown on the car, and the one that you have come to know over the last couple months. What you see on the car is the alternate "stacked" layout. That version, which is more square, is to be used when horizontal space is limited. The Honda logo will then be moved down and back, finding it's self near the middle of the cowling.