This is a fantastic scene! Everything’s moving forward toward the viewer and the Dutch tilt on the camera helps convey the dynamics of all that forward motion! I noticed that you’re thinking about putting birds in that “V” shaped crest between the statue and the building in the distance. Right now that “V” is acting as a directional element to point your eye to the explosion in back of the race car. If you put stuff there it might take your eye out of that wonderful flow you’ve got going on. Have you considered something else that would help accent that forward motion? Maybe a couple jets high up in the sky flying almost straight up, following that center point perspective, with some wispy contrails or something that act as arrows to direct your eye down to the explosion?
Just a thought. This image really stands out! It would make a killer poster!