Warner Archive Collection (WAC) pits the Justice League against Young Justice, sends Robby the Robot into retirement, fills the Los Angeles Convention Center with song, and spotlights the legendary films of Golden Harvest in a diverse array of entertaining panels this weekend, March 25-27, at WonderCon.

Top billing amongst the quartet of WAC offerings is undoubtedly the Sunday afternoon clash of Justice League vs. Young Justice, an ultimate celebration of two extremely popular animated series sharing the “justice” title. The panel will feature the ultimate fan favorite voices of Batman and Wonder Woman, Kevin Conroy and Susan Eisenberg, squaring off against Young Justice creators Greg Weisman and Brandon Vietti alongside voice cast members Khary Payton and Jason Spisak. More panelists will be announced as confirmed. The panel will be held Sunday from 2:00-3:00pm in Room 408AB.

Leading into the battle of justice is a more comedic, tuneful approach to animated super heroes: Warner Archive’s extremely popular Toonstock. Back for its fourth helping of Con fun, the retrospective hour-long look at cartoon music will once again include a fan sing-along to the “Mayhem of the Music Meister” episode of Batman: The Brave and the Bold – with James Arnold Taylor (Obi-Wan Kenobi in Star Wars: The Clone Wars, Flash in LEGO DC Comics Super Heroes films), the voice of Green Arrow, leading the way. Toonstock 4 will run Sunday from 1:00-2:00pm in Room 408AB.

Also on WAC’s agenda for the weekend is a Saturday morning retirement party for the world’s workingest robotic actor, Robby the Robot, and a Sunday afternoon tribute to the great films of Golden Harvest. Here are the complete panel descriptions, including all confirmed panelists for Warner Archive Collection:

Saturday, 3/26/16
10:00–11:00 Robby the Robot’s Retirement Party – Break out the Hawaiian shirts because Warner Archive Collection is throwing a party to celebrate Robby the Robot’s 60 years of service. Join Warner Archive Podcast hosts Matt Patterson and DW Ferranti, alongside noted robot aficionados, to celebrate the multi-decade career of this cybernetic cinema icon par excellence. Starting with the (not coincidentally) 60th anniversary of the landmark science fiction film, Forbidden Planet, fans will follow the voyage through Robby’s storied career on both the big and small screens. And be prepared for some special messages from surprise mechanical guests. Room 408AB

Sunday, 3/27/16
1:00—2:00 Toonstock 4: The Return of Warner Archive’s Music Meister Sing-Along – Once more, with feeling! You’re invited to the fourth celebration of toe-tapping, floor-stomping cartoon music, including the immensely popular sing-along with the Batman: The Brave and the Bold episode, “Mayhem of the Music Meister.” Join special guests James Arnold Taylor, the voice of Green Arrow, and composer Kristopher Carter of the prolific Dynamic Music Partners, along with Warner Archive Collection podcast hosts Matt Patterson & DW Ferranti and moderator Gary Miereanu (and, as always, a few potential surprise guests) for an entertaining, interactive look/listen at some of the great cartoon music of the past 50+ years. Room 408AB

Sunday, 3/27/16
2:00-3:00 Justice League vs. Young Justice – Two great animated “justice” series going head-to-head, and everyone is a winner as Warner Archive Collection celebrates celebrate both Justice League and Young Justice. Join some of the creative minds and talented voices behind both series – including the premier voices of Batman and Wonder Woman, Kevin Conroy and Susan Eisenberg, leading the Justice Leaguers, and Young Justice creators Greg Weisman (Gargoyles) and Brandon Vietti (LEGO DC Comics Super Heroes, Batman: Under the Red Hood) with everybody’s favorite voice of Cyborg, Khary Payton, and Jason Spisak, the heralded voice of Wally West/Kid Flash – for a blockbuster discussion of the two popular series under the guidance of Warner Archive Collection podcasters DW Ferranti and Matthew Patterson and moderator Gary Miereanu. Room 408AB

Sunday, 3/27/16
3:00-4:00 A Golden Harvest of 90s Hong Kong Films – Bursting onto the international scene with a new form of martial arts screen action, the films of Hong Kong are some of the most influential in cinema history. From the 70s through the 90s, Golden Harvest introduced stars like Bruce Lee, Jackie Chan, Sammo Hung, Tsui Hark and Jet Li to the world … and now Warner Archive is mining the depths of this unique library in order to bring a variety of action, historic, comedy, thriller and fantasies like Pedicab Driver, The Blade and A Terracotta Warrior to home entertainment for the first time. Join Warner Archive Podcasters Matt Patterson and DW Ferranti along with several HK film experts and witnesses to the behind-the-scenes action for an outrageous exploration of a filmic flashpoint. Room 408AB