Here's what I've learned about the upcoming update, keep in mind this is unofficial and may not be 100% accurate.
- Pounder and Bullhead receiving enlightenment
- Aids lvl 180+ will grant improved bonuses for HP/ATK
- Battle Square - Dropped heroes will have a short immunity duration after being placed.
- Keys can be gotten in Battle Square rewards that will allow players to open reward chests immediately with no jewels spent or timer.
- Elders will be able to reset quests in Guild United
- Ancient Spirit shards will be added to continent lords league rewards.
Again, this is a little bit speculation so don't take it as the absolute truth.