It seems one of our Forum users vantor has seen Episode 5.01 and 5.02 of the new Season and they have posted a number of spoilers in this thread here. They are spread across several posts in the thread and some of them give a number of big details/plot details from the Episodes so only look if you want to know.
Note: The answers they are posting in some instances are their interpretation of what they have seen and the user in question does not have English as a first language so some works may be interpreted differently.