I noticed one and was hoping someone could explain if it means anything further. I apologize if this has been posted before.

The Question's card depicts a billboard with "The city's", a street sign with "hope", a newspaper with "rests", and a paper with "with", but then stops. Does anyone know what more this is supposed to say?

And in case no one else had mentioned: The view screen on Brooklyn HQ depicts Superman as shown on his 9-drop.

The 9 drop and brooklyn hq are done by the same artist. The question thing I don't know, maybe related to 52.

I assume it's supposed to mean "with the Question".

A couple of other things I've heard of/seen are:

Burn Baby Burn is the same number as Have a Blast, with very similar art.

The plot twist All Locked Up [the reinforcement card] has a number on top of Hector Hammonds cell DWF-xxx ... the number is for Joker's 6-drop.

The new Batmobile's version is "burn rubber" an obvious reference to the Vs. card "Burn Rubber" which, like the new batmobile, gives a character reinforcement and allows you to move that character to another row.

so wats the alt art for DWF?

It would be the no cost superman, he has no text about his no cost and the superman symbol is in the cost box.