In the sprawling universe of media theory, the 12 theories included in Media Ecology for the 21st Century: Theories of Culture, Communications, and Consciousness represent carefully chosen constellations—guiding stars in understanding the intersection of machine intelligence, culture, and human motivations. However, the sky is vast, and many other theories shimmer just beyond our focus. These excluded theories remain significant, offering complementary or even contrasting perspectives. They deserve acknowledgment for their contributions and potential relevance in the evolving media ecosystem. Think of this chapter as a “behind-the-scenes” tour, exploring the theories we left behind and why we made those choices.