Anyway, a single-style/family OTC that combines all of its fonts is called a Super OTC. When multiple styles of the same family, such as Source Han Sans (36 fonts), Source Han Serif (28 fonts), and the Japanese-only Source Han Code JP (14 fonts), are combined into a single OpenType Collection, it is called a Mega OTC, and its name is therefore Source Han Mega OTC (78 fonts). By extension, the Noto CJK Mega OTC (64 fonts) includes Noto Sans CJK (36 fonts) and Noto Serif CJK (28 fonts).
We can take this to the next level, which is to combine the Source Han Mega OTC and Noto CJK Mega OTC into an even larger OpenType Collection with 142 fonts, called Source Han & Noto CJK Ultra OTC.
https://github.com/adobe-fonts/source-han-super-otc
https://blogs.adobe.com/CCJKType/2017/08/super-mega-ultra-otcs.html