Variety
http://variety.com/2013/tv/news/toy-story-of-terror-abc-disney-pixar-1200576260/
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While Terror will include Woody (Tom Hanks), Buzz (Tim Allen), Mr. Potato Head (Don Rickles), and Rex (Wallace Shawn), Jessie (Joan Cusack) will have a more prominent role in the special. Additionally, Bonnie’s toys — Mr. Pricklepants (Timothy Dalton) and Trixie (Kristen Schaal) — who first appeared in the third installment, will be featured, while we’ll also get to actually meet Combat Carl, who briefly appeared in the first film when he was blown up by Sid, who will be voiced by Carl Weathers.
ABC describes the event as, “What starts out as a fun road trip for the ‘Toy Story’ gang takes an unexpected turn for the worse when the trip detours to a roadside motel. After one of the toys goes missing, the others find themselves caught up in a mysterious sequence of events that must be solved before they all suffer the same fate in this ‘Toy Story OF TERROR!’”