A little late to the party posting this (real life got in the way!), but LEGO has officially announced the biggest Minecraft set – 21137 The Mountain Cave. The LEGO Minecraft Mountain Cave contains 2863 pieces, handily surpassing 21128 The Village by 1263 pieces. The Mountain Cave will retail for AU$399.99 / US$249.99 / CA $299.99 /…