The list of the LCBO 2012 Halloween Release was originally posted on The Bar Towel:
Item # / Product Name / Size (mL) / Retail
296111 / Witches Brew Tripel / 750 / $7.95 (RB)
201665 / Mt. Begbie Nasty Habit IPA / 650 / $6.10 (RB)
311225 / Black Creek Pumpkin Ale / 500 / $3.50 (RB)
132753 / Grand River Highballer Pumpkin / 500 / $3.85 (RB)
303610 / Howe Sound Pumpkineater / 1000 / $11.35 (RB)
264184 / DDC Corne du Diable IPA / 341 / $2.90 (RB)
90738 / St. Ambroise Pumpkin Ale / 4 x 341 / $9.95 (RB)
90373 / Post Road Pumpkin Ale / 355 / $2.65 (RB)
296186 / Chatoe Rogue Pumpkin Patch Ale / 650 / $6.75 (RB)
182287 / Southern Tier Pumking / 650 / $8.75 (RB)
There should be a couple of other Ontario examples – Great Lakes and Beau’s – but don’t ask me why they are not included when Black Creek and Grand River are. Sometimes it’s best not to try and understand the LCBO.
A Year Of Beer! 
Isn’t there also a Brooklyn Brewery Pumpkin Ale being released?
Katy, the Brooklyn is the Post Road. It’s a brand they bought years ago, and have kept the name.
No Westvleteren 12 ?
No clue when that will be coming. Not really a Halloween beer, though