Arcade Mode

How many people have unlocked all 34 tracks and all the extra cars for arcade mode yet. I just finished unlocking everything and does it ever bring a package of beatiful cars to arcade mode. Tell me what you all have completed yet and also does anyone know if professional mode on arcade unlocks anything when completed?
 
If your talking about professional mode go to hard and hold R1 and L1 and hard will change to professional which is the only mode cpu cars go there actullal cars top speed
 
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