Having already seen one Cartoon Network show get remade into anime lets see if any others would work in the Top 10 Cartoon Network shows that would work as anime.
Missing in Action
Samurai Jack: Fine the way it is.
Kids Next Door: Concept is far too American to work as an Anime.
Ben 10: Uses Anime art styles.
Puffy AmiYumi: The idea of it was to appeal to Western fans, doing it anime style would be pointless.
Megas XLR: It's meant to spoof anime as well as act as a Western take on the Mecha Genre.
Powerpuff Girls: Already remade as an anime.
Now with those out the way lets begin.
10. Robotboy
As the only robot series in the Network's library to actually be half decent, making the next step into anime seems like a natural transition, especially when it makes the designs more interesting.
9. Life And Times of Juniper Lee
A teenage girl who's already Asian fighting monsters using superpowers. Monster Hunter Juniper sounds like a good anime title and the set pieces wouldn't take long to remake.
8. Grim Adventures of Billy & Mandy
A strange choice but the idea of a Grim Reaper being the butt monkey of an idiot and an angry girl makes for some fun slapstick, would work especially well in Soul Eater's Art Style.
7. Ed, Edd & Eddy
While the concept is very American it would work as a school comedy especially when you expand on the many schemes that take place and the voice actors are all Anime trained anyway. (Kira Yamato & Ed are the same actor that still baffles me)
6. Foster's Home for Imaginary Friends
Creative design may allow for this to expand beyond the simple concept of imaginary friends and go into much deeper territories that in it's American form are too afraid to explore.
5. Hero 108
Has the same creative display as Foster's Home and the main hero is more than capable of being a Shonen Jump cover model. It's also open to the Shonen Jump endless action series status.
4. Captain Planet
A group of five teenagers combine their element rings together to summon a superhero, although this might actually work as a super sentai series. They each transform into a hero with their element power then fuse to create Captain Planet, write this down Japan.
3. Dexter's Laboratory
If fanart is anything to go by then Dexter was made to be in an anime. The creative genius of his inventions combined with his many adventures in giant robots make for an easy transition.
2. Johnny Bravo
Seeing as he's so unpopular with women, he definitely qualifies for a harem protagonist, plus it might shed some of the stupid that plagued his character in his later episodes.
1. Adventure Time
100% works as an Anime and should be an Anime. I've seen tons of good fanart from Adventure Time in anime form and it's so beautiful to look at and the concept of the show makes for an easy sell in Japan.
Bonus: For a fair idea of what Cartoon Network characters may look like in anime form take a look at this website.
http://snafucomics.wikia.com/wiki/Snafu_Comics_Wiki