I honestly have no idea how that picture constitutes a spoiler.
Unless an alternate dimesnion Ned Stark from a modernized, urban version of Westeros is going to show up in season two and start fondling his secretary on the Iron Thorne, in which case I apologize for spoiling everyone.
Well, that would certainly appeal to the folks who had the theory (at the start of the show) that Jon Snow's mom was Cersei and he was also the "black-haired baby" she told Catelyn about...
As for the length of seasons in the GoT world:
Are the long seasons isolated only to the continent of Westeros or are they all over the world?