As great as that would be for a clue, doesn't anyone else think we've had a bunch of space themes already? It was only last year, 2011, that we had Alien Conquest. I expected it to run longer but LEGO let it run only in 2011. I like space themes alot (Mars Mission, Alien Conquest, Space Police), but I would like to see the Polar Xxpress theme push through. The last time TLG made a polar theme was in the early 2000's. Since then, there was some arctic-related activity in Alpha Team and Star Wars (Hoth of course). There have been quite a number of collectible space minifigures (series 1, 3, 6, 7 and 8). I would like to see more modern arctic sets. Just like the underground theme (Rock Raiders and Power Miners) and ninja themes (Ninja, Ninjago), these are not frequent and are more exciting than recreating the same type of theme with different pieces. That is one reason I didn't Kingdoms right after Castle (2008 version). It felt repetitive!
I apologize Gatanui. I am not trying to diminish your hopes on another space theme.