Surprise Versions?

On the forums I found this:

亲爱的玩家们，

感恩节，寓意丰收、团聚。在此，我们不但给大家准备了丰厚的礼物还带来了振奋人心的消息：
——为庆祝感恩节，《小小军团》1.9版本会在近期开放；
——11月26日--11月28日，每天加开兽人关卡1次；
——圣诞节附近会有惊喜版本放出，请大家拭目以待；
——凡在11月26日登录的玩家（以服务器时间为准），都可以免费领取我们精心准备的感恩节礼物。
礼物：圣杯x1，金币x100万，水晶x100

祝大家节日愉快！

《小小军团》制作团队
2015年11月24日

Since I'm Chinese, I'll do a translation for people who don't speak it.

Dear players,

Thanksgiving means harvest and reunion. Thus, we give you not only generous gift, but also exciting news:
- To celebrate Thanksgiving, Mini Warriors 1.9 will release in the near future;
- November 26 - November 28, the orc stage will be open.
- Close to Christmas there will be a surprise version released, please wait and see;
- If a player logs in on November 26 (server-time), the player can receive a free Thanksgiving gift we have prepared.
Gift: Golden Goblet x1, 10000000 gold, and 100 crystals.

Happy holidays everyone!

Mini Warriors Team
November 24, 2015

I want to draw attention to the "surprise version" mentioned in the third point. What will this be? Speculate below in the comments!