Here is the design for Icese, Olrasaurus's next rival in the sequel to "The Discontent Summer". I scrapped the mutant rat idea and went towards an 'ice demon' origin and created a creature reflecting that backstory. Icese stands 60 meters tall (10 meters taller than OS) and its body is completely covered in ice with a fleshy body underneath (The ice acts as an exoskeleton). The story behind Icese is that thousands of years ago, humans were controlled by creatures of different elements one of ice (Icese), one of earth, and one of fire. However when an ancient civilisation with advance technology created an army of giant monsters (same civilization that created Olrasaurus) and used them to combat against the demons. While the Earth and Fire demons perished, the Ice Demon Icese escaped and went into hiding till a day where it will again take the world by storm. However when he reawakens, he was not aware that an ancient foe has also returned as well.

UPDATE:

The DS Sequel has now been scrapped till further notice, but I decided to keep this picture up because Icese seems like a nifty original kaiju