By, or around the time the next expansion for Hearthstone is released, Blizzard will fulfill at least one of the following four community's wishes (clarification in comments).

Created by timujin on 2015-05-26; known on 2016-07-01; judged right by timujin on 2015-08-05.

• timujin estimated 40% on 2015-05-26
• timujin said “1) Direct Dr. Boom nerf (releasing a new card that makes him less useful doesn’t count).” on 2015-05-26
• timujin said “2) Changes to ladder system that would give more incentive to rank up for those who don’t go for legend.” on 2015-05-26
• timujin said “3) More deck slots.” on 2015-05-26
• timujin said “4) Ability to get all types of card packs from Arena.” on 2015-05-26
• allchampion estimated 3% on 2015-05-26
• JoshuaZ estimated 35% on 2015-05-26
• VoidChronos estimated 60% on 2015-05-26
• ChristianKl estimated 25% on 2015-05-28
• aarongertler estimated 55% and said “Blizzard hasn’t been shy about nerfs as a company. ” on 2015-06-21
• timujin   judged this prediction right on 2015-08-05.
• timujin said “Recent announcements reveal that both #2 and #4 are due with The Grand Tournament expansion.” on 2015-08-05