NBA 2K Mobile is adding another theme to its collection, although it's not clear when it will release. A picture of NBA legend Ray Allen was shared on Twitter as a tease. 

Since it's almost St. Patrick's Day, it's very possible that it could be a card set dedicated to the Boston Celtics. After all, the iconic Celtics are covered in leaf clovers. 

If that's the case, then you can probably see some great cards. Since Allen has been teased, it's possible we'll also see the likes of Kevin Garnett and Paul Pierce, who Allen was teammates with when they won the 2008 NBA Championship. 

It's also a possibility that you'll see legends of yesteryear such as Bill Russell, who is arguably the greatest Celtic of all-time. Larry Bird could be included in the set as well, but this is only speculation. 

Another possible theme is a set with the best three-point shooters in history. This is because Allen is widely regarded as the second-best shooter who ever played the game, only behind current superstar Stephen Curry.

This would be pretty cool if so, as there have been many excellent three-point shooters over the years. When you think of the great shooters back in the day, you think of the aforementioned Bird, Steve Kerr, and Reggie Miller.

In the early to mid-2000s, you had players like Peja Stojakovic, a younger Allen, and Steve Nash in the mix. And of course, of the current era, guys like Curry, Klay Thompson, Kyle Korver, and Buddy Hield round out that group. 

I'm leaning towards it being a Celtics-themed pack, but anything's possible. Only time will tell, I guess.

NBA 2K Mobile is available for free on Google Play and the App Store.

Love the adrenaline of sports? Then check out the top 25 sports games for iPhone and iPad