I'd expect a different lineup since Trevor said he wanted to break the blue characters away from immediately after each other. The way I think such a plan would be doable would be:
Volume 6, whichever figure it ends up being.
Volume 7: Oscar The Grouch, green character.
Herry Monster, blue character.
Sherlock Hemlock, green character with brown plaid coat, still no news on Watson.
Grover & Mr. Johnson 2-pack, both blue characters.
Frazzle, red-orange character.
Then, if the line's still going, Cookie Monster, blue character.
Course, they could add Guy Smiley and/or the Two-Headed Monster to have further separation. The great thing is I'm already scheming the display of all these figures in my mindspace.