If nothing else, I feel this project has more or less validated my Iconic Character Design Theory (Iconic Character = Number of Unique Characteristics, 1 around head + Limited Colour Palette) as the majority of the redesigns are still recognisable as the original 'monsters'. The exception, of course, was the Jabberwock, whose design is not totally defined in it's original source to begin with. In my defence, it's inclusion was suggested by Josh, whereas the others were chosen because their original designs fit the criteria. But, no use crying over spilt milk; the fact is I did a Jabberwock redesign and despite my grumblings it does have some traits from the original.
So, to summarise, the character traits of these monsters are as follows:-
Jabberwocky
Characteristics: 'Fiery' eyes (Head), large claws, whiskers/ hair tendrils (Head), wings/ wing-like sails
Colour: Variable (Jabberwocky colour isn't mentioned in source)
Cthulhu
Characteristics: Octopus/ Squid face (Head), wings, humanoid body
Colour: Green
Medusa
Characteristics: Snake hair (Head), snake lower body
Colour: Variable (Medusa doesn't really have a defined colour scheme)
Devil
Characteristics: Horns (Head), wings, pointed tail, trident, goat legs (optional)
Colour: Red
So... yeah, this project basically went as expected and proved I wasn't talking out of my arse.
The next project will be the final one and will focus on me using this Iconic Design Theory to design some original characters. Beyond that though.... I'm still working on the details. Watch this space.