First, let me address the rumor accidentally generated at the panel - Batman: The Brave and the Bold is NOT cancelled. The show will come to an end after the third season, not after the second season, as reported on many comic news sites. So the tally will be -
Season 1 - 26 episodes (all have aired)
Season 2 - 26 episodes (12 have aired* + 10 more in the can + 4 more in production)
Season 3 - 13 episodes (all in various stages of production from being-animated-overseas to still-just-a-germ-in-James-or-Michael's-head)
Anyone reporting the show's ending at 52 episodes is misinformed.
Also announced at the panel is the upcoming appearance of two new characters - James dug deep into DC's Golden Age and scrounged up some Depression-era strongman and a World War Two era princess with a magic rope or something, and they'll be appearing in Season 3. The crowd seemed pretty excited about that, even though they lack the star power of, say, Ultra the Multi-Alien, who will be appearing very soon in Season 2.
Tell you what -
But hey, if you're looking for more spoilers, check out this promotional video of a Season 3 voice recording. If you have sharp eyes, you can spot my face through the glass in the background around 0:42, looming over the proceedings like a pale giant-foreheaded ghost.
To top it all off, when I got back from San Diego, I found this interview with none other than Grant Morrison, in which he says he's a "big fan" of our show. Wow! That's pretty gratifying, what with him being one of my favorite writers and all. Hopefully he'll appreciate our little nods to his Doom Patrol and Batman R.I.P. runs in upcoming Season 2 episodes.
*not counting either the episode that aired only in the UK or the episode that aired only in Australia.