Unknown McKone JLA Pencil Piece

As I recall, I picked this up from McKone around 2002/2003. I don't think he even recalled what this was drawn for. There are two empty panels laid out underneath this drawing. The pencil drawing accounts for about a third of the art board, and features Superman, Aquaman, Superboy, Wonder Woman, Martian Manhunter, and a couple of DEO agents. Oh, and there's Steel off on the far left. Very faintly, an outline of Batman and Robin can be seen above and to the right. The pencil lines are so faint that they don't show up on the scan, sadly.

If you have any idea what this might be from, please let me know. I'm guessing it was JLA related in some way, but that's all I've got.