I think spoiler discussion is okay, so long as it's all correctly tagged and labelled so people have a vague idea of what will be spoiled if they choose to click. Basically, don't be ambiguous about it, and certainly don't be a dick. But if a number of you are uncomfortable with us posting about leaked spoilers in this thread, I'll happily stop. Though I'm sure those who don't want to be spoiled can exercise the self-control required to not click the tags...LEAKED-PIC SPOILERS
I'm not sure if I'm looking at the right picture, but the one I found has Arabic text below that says انا ابوك written from left to right for some reason (Arabic is written right to left), which means 'I am your father', if it's a nightmare it's Tenzin's.
PS: Are people comfortable with us discussing this here or should we stop? I'm not sure on the rules
Mega leaked pic spoilers:
Yep, we're talking about the same picture. In which case, it's probably Tenzin's nightmare. Or actually Aang (but that's ridiculous, see my last post on the matter). Maybe Tenzin has fears and/or insecurities about who Amon is himself, since he strongly believes only Avatars can do what Amon does.