The next release is all about class balance. It's going to change a lot of skills. See the notes here.
Of more fun, the Summer festival looks to be really interesting:
Summer Festivity: The Perfect Picnic - We have a new Summer Festival activity which is currently listed under Skirmishes, but will be known under another name soon (possibly "Festivities"). Fellowship sizes: 1, 3, 6, 12.
Summer Boss-fight: Thrang - We are revisiting the Thrang encounter as part of the Summer Festival. This fight will be familiar to those who've fought Thrang before, but we are tweaking this version to provide a new experience with special awards. Fellowship size: 6.