In a recent forum post, Blizzard has confirmed that the next beta phase for Hearthstone: Heroes of Warcraft has been delayed.
The decision to delay the next part of the game's beta was explained in the following statement: "During today's Hearthstone closed beta maintenance (Thursday, January 2nd), we've discovered some pesky sprites that are currently preventing us from properly transitioning from Test Season 1 to Test Season 2. Due to these issues, we are extending the duration of Test Season 1 until we can ensure a smooth transition."
At the end of last month Blizzard's Jason Chayes said "we're close to the open beta-very close", although it now seems we'll have a little longer to wait. Despite the delay to the open beta, can still opt in for the closed beta before the cut off date of January 7 (via Battle.net).
To find out why you should be excited about Hearthstone, you can read our preview of the new card game from Blizzard right here.