I'm down for more Panda and Dragon. This really shouldn't even be a surprise at this point that Katzenberg wants 5 more Panda movies, I thought that was common knowledge at this point, seeing as how he said that as far back as when the first movie was just out, and IIRC, I think there was one sequel to Dragon planned while that was still in theaters.
They can crank out as many sequels as they want, just as long as they don't leave a bad taste in my mouth like Shrek the Third, It's the only Shrek film to date that I don't like, and I will admit that I love Shrek 2 over the first one. I enjoyed the story in the 2nd one over the 1st, and Puss in Boots was a nice addition to the crew.