Not that I have read but they're already underway with recording voceovers for the 4th & 5th content updates so I would like to hope that we get some class stuff at some point. I'm going to assume that this new planet will be a level 50 one so perhaps that will include some. If not it must have some new quests on at least.
I expect they'll keep some of it as a surprise until we get nearer to each release too.
Still. One of the main things which can make or break an MMO is the post-launch support for implementing fixes, new content and listening to feedback and they seem to be doing a bloody good job so far. Really happy to hear that they've already got several big updates planned and being worked on, some of which we won't get to see for quite some time too.
"My name is Ozymandias, King of Kings:
Look on my works, ye mighty, and despair!"
Nothing beside remains. Round the decay
Of that colossal wreck, boundless and bare,
The lone and level sands stretch far away.