The Endless Waltz Redesign
In Endless Waltz, all of the major Gundams underwent a massive redesign by Katoki Hajime. The Gundams are still the same ones that were used at the end of the TV series, although changed from the original TV versions. The Gundams have more stylized (and somewhat ostentatious) appearances, reflected in the "Angel Wings" of the Wing Gundam ZERO, the "bat wing"-styled cloak and much more demonic appearance of the Gundam Deathscythe Hell, and the more dragon-like appearance of the Nataku Gundam. Zechs Merquise also appears in the series piloting the new Tallgeese III, which has several similarities with the Tallgeese II. Despite the dramatically different designs of the Gundams, the story in the OVA retcons them. The redesigned version of Wing ZERO is also very popular among fans and is commonly known as the "Wing ZERO Custom."
Read more about this topic: Gundam Wing: Endless Waltz