When I was 7 years old, I had a coloring book that was a interpretation of this story from the original comic books. Everything is exactly the same. Even the lil fly that Kirby makes as Donny is watching. The stick figure. The doorway. Even Raph in the shower complaining about the hot water! This is such a nostalgia trip.
If they keep in the lil arm blowing thing and the big mecha that Kirby draws for Don, along with the final little picture that flies out of the doorway at the end, this episode will have made my entire day.
Also, I'm liking the lil orchestra/chorus music in the fight scenes.
Kirby? King? Indeed! I wonder if anyone will make an homage to the Kubert brothers of Marvel in the future, as they're my favorite comic artists.
On a quick side note: I'm not sure where it was, cause I don't think it was in the movies, but I KNOW I've heard April say "Wow, these guys ARE good." before.
UPDATE: a) My day has been made. b) What a great episode.