The video and single release of "Rhinestone Eyes" was pulled and replaced with "Doncamatic". This has led to a lot of people being concerned about how much trust EMI has in the project anymore. Hewlett claimed later that EMI didn't have the money to afford another video, since "Stylo" turned out to cost much more than they expected.
These fears are being renewed now that EMI has pulled their funding for the rest of the Plastic Beach arc, resulting in a rushed ending.
Named After Somebody Famous: An inversion, for singer/2D voice Damon Albarn. A manga writer in Japan decided to name his protagonist Maka Albarn after one of his favorite musicians. In the animated adaptation, her theme song is a punk-rockish, closely resembling the style of many Gorillaz songs.
Gorillaz is known to leave off several tracks for each album either as secret bonuses or as incentive to buy additional EPs or special-edition albums. Usually, however, at the end of a phase a corresponding B-side album is released containing these songs. Unfortunately, the supplemental material plays this completely straight.
Besides this, there are often tracks added into the release of certain albums only in certain areas, with the Japanese release of each studio album getting 1 or 2 songs that otherwise wouldn't be available until the singles or B-side collection gets released.
So My Kids Can Listen: The exact reason why Bobby Womack came out of retirement to sing on "Stylo" (his daughter specifically nudged him to work with Albarn). The song revitalized public interest in Womack, leading to his first album in 18 years.
Technology Marches On: At the time, the fact that the first Gorillaz CD gave you access to exclusive content on the band's interactive site was revolutionary. Now, if you play that movie that pops up when you put the disc into your computer all the way through, your browser opens up... to an error message. Indeed the whole "Enhanced CD" fad was on its last legs around the time of the first Gorillaz album. Compare Demon Days and Plastic Beach which feature no such Autoplay content, but merely references in the booklet to sections of the band's website to find lyrics and other content.
Throw It In: According to interviews, the title of the song "Dare" came from the fact that the guest singer, Shaun Ryder, couldn't pronounce "there" because of his accent. The original lyric was, "It's coming up, it's coming up, it's coming up, it's there!" But it was changed after a few takes proved it impossible to record that understandably.
Phase 3 had an entire 2 hours of music that was getting saved for a sequel album that was never made. Presumably this is why the plot was moving so slowly. Because of this, almost nothing got resolved and we're left to imagine what actually happened across the five-year time span.