For starters, I’d increase the samples since the character and most of the scene is quite grainy. Never mind that’s just the website’s preview.
I don’t know what else you could add now besides what you said that you’ll be working on. You could always make the NPC look a bit more like Reeves but there’s a risk of DMCA. Keep up the good work!
I think it looks great. The rainwater on the street looks a bit flat though. I suggest making ripples to give it a fuller look. Also, the headlights on the Veneno and bike are off, even though it’s dark outside. I believe it would look better with them on. That’s all I can think of!
Edit: Scratch that, it’s not dark outside, I was only looking at the bottom of the picture.
Looks really good you should add some lights on the car. And maybe add a person in the car in the back, of the motorcycle I would suggest you add those! To the image…!