OH MY GLOB, YOU GUYS!
The pages basically show the Scream Queens getting ready to do a concert in the Candy Kingdom and a reluctant host of rock-hating PB being coaxed by Finn and Jake into watching.
And Marceline saying that they are going to go on a massive tour... looking thoughtful...
Can't wait for the first issue, people.
I could perhaps do an in-depth analysis of this tiny preview but I'm not going to.