((sorry, guys, I been out of town the last few days without internet - gasp! and I have to leave again tomorrow night. I'll post what I can today and tomorrow and then I won't be able to get back to you again until next Saturday, sorry for that ... so let me catch up...))
Close one, Kai! You're kinda right, but not really, about the gods, I mean.
Now, Tai got one right: our 7 characters have to be at the Gates of Heaven for the final showdown during the (we'll go by Tai's timeline) week that the bluebells are in bloom.
Your first hint: when you arrive at the Gates, you will have a couple of tasks (namely, defeating the bad guys) but also one in particular that is stated in the rede. Doing this one task will cause ... "Life once more [to] spring."
One other hint: remember that winter was just ending, spring just beginning when the plague came again unexpectedly. That one incident started the whole journey, at least for Dmitri, so may I add that you guys all came to Stonehenge looking for something ... at a particular time ... maybe as kinda stated in the rede?
What else have you got?