"The Top 2 finishers with Mirran-affiliated decks receive a Pristine Talisman preview card from Mirrodin Pure. The Top 2 finishers with Phyrexia-affiliated decks receive a Suture Priest preview card from New Phyrexia! This is in addition to any Top 8 prize cards you might win for their overall event finish."
I don't think it's that weird at all... either way it turns out, the third set will still have at least some Mirran and some Phyrexian cards, whether it turns out to be Mirrodin Pure or New Phyrexia.
http://www.wizards.com/Magic/TCG/Events.aspx?x=mtgcom/events/gameday-facts
"The Top 2 finishers with Mirran-affiliated decks receive a Pristine Talisman preview card from Mirrodin Pure. The Top 2 finishers with Phyrexia-affiliated decks receive a Suture Priest preview card from New Phyrexia! This is in addition to any Top 8 prize cards you might win for their overall event finish."
Let this great clan rest in peace (2001-2011)