The "standard notice" is what I'm thinking as well.That seems to be the standard notice that they send when you're a month out from the annual fee posting. I got the same letter last month but with the note that it'd be on my September statement. I cancelled the card before it posted, but it's a standard letter that they send each year before the annual fee posts.
All it really indicates is that BoA hasn't sunsetted the card in their system yet.
I won't expect to see mine until November.