It's being explained to us now in chat...seems like Nolan may number his "scenes" by "shot" instead. How it's numbered on the shot list.
So "scene 290" is really "shot 290" on the shot list. Explains why the bank robbery in TDK could be "16W." Shot 16 on the shot list.
Now the question is...how many shots are there in a Nolan Batman movie?

Well you should take the credit, O Wise One.Anita is correct. 290 is a reference to the number on the shot list. The w implies wideshot in the 16W. Notice the take number next to it.

It's being explained to us now in chat...seems like Nolan may number his "scenes" by "shot" instead. How it's numbered on the shot list.
So "scene 290" is really "shot 290" on the shot list. Explains why the bank robbery in TDK could be "16W." Shot 16 on the shot list.
Now the question is...how many shots are there in a Nolan Batman movie?
Anita is correct. 290 is a reference to the number on the shot list. The w implies wideshot in the 16W. Notice the take number next to it.
Is it the same scripty on this film as the last?
Anita (or RedSkull) what, in your professional opinion would the "j" mean after the scene (shot) number on the slate I saw at Heinz Field? It appeared to be a close up of the boy singing the national anthem. I think it was the first shot of the day.

I'm not Anita or RedSkull, but J for Joker is all I can come up with.
According to IMdB, it is. Steve Gherke.
edit: He also worked on Inception and Memento.

Bruce Wayne: Every riddle has a number in the question and they arrived at this order: 13, 1, 8, and 5.
Alfred Pennyworth: 13, 1, 8, and 5. What do they mean?
Bruce Wayne: Perhaps letters of the alphabet?
Alfred Pennyworth: Of course, 13 is M.
Bruce Wayne: 1 would be A, 8 would be H, and 5 would be E.
Alfred Pennyworth: M-A-H-E.
Bruce Wayne: Perhaps 1 and 8 are 18.
Alfred Pennyworth: 18 is R. M-R-E.
Bruce Wayne: How about Mr. E.?
Alfred Pennyworth: Mystery.
Bruce Wayne: And another name for mystery?
Alfred Pennyworth: Enigma.
Bruce Wayne: Mr. E. Nygma. Edward Nygma.
*all I've thought of, during my backreading of the last few pages...

You make a good point. It makes perfect sense based on coverage and whatnot. However, what confused me was that when they shot the National Anthem at Heinz Field, they only shot about two or three angles and the slate read 189j for one of the takes. I could not figure out their system either!
It's being explained to us now in chat...seems like Nolan may number his "scenes" by "shot" instead. How it's numbered on the shot list.
So "scene 290" is really "shot 290" on the shot list. Explains why the bank robbery in TDK could be "16W." Shot 16 on the shot list.
Now the question is...how many shots are there in a Nolan Batman movie?
The w implies wideshot in the 16W. Notice the take number next to it.
It's being explained to us now in chat...seems like Nolan may number his "scenes" by "shot" instead. How it's numbered on the shot list.
So "scene 290" is really "shot 290" on the shot list. Explains why the bank robbery in TDK could be "16W." Shot 16 on the shot list.
Now the question is...how many shots are there in a Nolan Batman movie?

 
				