Hi C,
The IRF7207 is already hard On with the existing Vgs of close to -9V, check this image
The 2N2222 Base is connected to a PIC output pin via a 1K, you will not get unwanted turn On, unless the Base is left disconnected.
E
EDIT:
This is the way to control the bridge, as per
Misterbenn
The sequence you suggest "OFF>>1 ON then PWM 4>>ALL OFF>>2 ON then PWM 3>>ALL OFF" will work well as the switching delay will be neglected. And you've selected the correct 'slower' switching fets to turn on while PWM the faster switching 4&3.