Ok, I googled it and found this definition
So I'm assuming a stylized "NO" or "NOLA".a printed or written character (as æ or ƒƒ) consisting of two or more letters or characters joined together
This makes since as he specifically said he could not wait to see them on hats. Also, I'm predicting it to be a joint logo to be used for both teams, probably in gold.
Can't wait until tomorrow!