Night time grand slam arenas locked to deluxe/grand slam edition?

[yndajas]

The Under the Lights pack gives you access to night time grand slam arenas. It's included in the deluxe and grand slam editions of the game, and it looks like there's no way to buy it separately or upgrade to the deluxe/grand slam edition after buying the regular edition (without paying full price twice)

 

I saw something about this in a video a while back, but after reading the PSN store descriptions on Friday and doing some light research, I couldn't find anything obvious to back it up. But now I have the regular version of game it appears to be correct

 

Worth bearing in mind if you aren't sure which version to get. You'll still get the daytime grand slam arenas and plenty of other night time venues in the regular version. I'm not too familiar with how 2K operates, but maybe there's a slim chance they'll release the pack separately or make it possible to upgrade your edition later?