Those designs have definitely a Pixar feel to them as they immediately remind us of The Incredibles or Up. Some commentators compared Lord Macintosh to Muntz and the Wise Woman to a Carl Fredericksen in drag :-)
My favourite are actually Lord Macintosh and the Wise Woman as they are much more graphic than the other character. As a matter of fact I have decided to model those two in order to better understand the Pixar style and improve my modeling skills.
I modelled Lord Macintosh in Maya starting from a plane and using the edge extrusion technique in order to quickly create some edge loops then refined the base shape by cutting faces, merging and moving vertices around. Nothing too fancy. I have some experience with that type of modelling but I think I will try the Zbrush approach for the Wise Woman. My friend Richie just showed me the work of Tom Parker, an incredible Zbrush modeler that can knock out a piece in less than two hours.
Here is the timelapse, I only recorded the first few hours as the final “vertex cleaning/edge rerouting” pass is too tedious to watch. I hope you will find this interesting, the video is a sequence of automated screenshots hence the choppiness.