Mattypalooza is underway at San Diego Comic Con and Ghostbusters Fans has the inside scoop of the upcoming figures to be released from Mattel over the next 6 months.
Aug 2011: Ready to Believe You Egon Spengler (with Library Ghost)
Oct 2011: Ghostbusters 2 Slime Blower Ray Stantz (with Cinema Ghost)
Dec 2011: Vigo the Carpathian
Jan 2012: Ready to Believe You Peter Venkman (with Taxi Ghost)
April 2012: Club Ecto-1 Exclusive Rookie Ghostbuster
April 2012: Dana Barrett as Zuul
Oct 2011: Peter Venkman & Winston Zeddemore 12" 2 Pack
Spring 2012: Ray Stantz & Egon Spengler 12" 2 Pack
Fall 2011: Janine Melnitz & Samhain 2-Pack with Accessories & 22" Firehouse Diorama. (Toys R Us Exclusive)
Oct 2011: Ghost Trap Prop Replica for $120.
Thanks for Vincenzo330 of the So-Cal Ghostbusters and Toy Ark for up to the minute details.