The saga of the Dragon Sabre really began when Yu Doi Nam was unable to bring the Dragon Sabre safely back to Mt. Mo Dong and hand it over to his teacher, Cheung 3 Fung, to decide what should be done with it. From that point on, pursuit of this fabled weapon would bring turmoil to wulin for the next twenty years.
If Yu Doi Nam had been able to safely bring the Dragon Sabre to Cheung 3 Fung at Mo Dong, things would have played out very differently. There would have been headaches for both Mo Dong and those interested in the Dragon Sabre (more or less all of wulin). Cheung 3 Fung would know that the presence of the Dragon Sabre at Mo Dong would attract problems and controversy. Although Cheung 3 Fung and Mo Dong were well respected in wulin, wulin at large would not approve of the Mo Dong Sect hoarding the Dragon Sabre (and even Cheung 3 Fung would agree that he has no justification for claiming exclusive Mo Dong possession of the Dragon Sabre). Cheung 3 Fung might have been at a loss for what would be the appropriate decision regarding the future of the weapon.
On the other side of the coin, the Heavenly Eagle Sect would not have been able to obtain the Dragon Sabre. It's one thing to steal it from an isolated Yu Doi Nam. It's quite another to try to steal it from Mt. Mo Dong where all seven Mo Dong Heroes and Cheung 3 Fung are present. Golden Haired Lion King Tse Tsun and the Yuan Dynasty's mercenaries also would not have been able to take the Dragon Sabre for the same reasons. Other sects such as Shaolin, Kunlun, and Hung Dung would have had to engage in open warfare against Mo Dong to take the Dragon Sabre, but even if they succeed, it would be costly. Moreover, where would their face be for doing such a thing? Unlike the Ming Cult, whom the orthodox sects could pass off as a "demonic sect" that they were attacking for the "good" of society, Mo Dong was highly respected and an attack on Mo Dong on false pretenses would not have been accepted as legitimate by the wulin public.
Ngor Mei Sect could make a legitimate claim to the Dragon Sabre (it was the rightful possession of the Gwok family, after all, and Gwok Seung was the Ngor Mei Sect's founder), but to make this claim, Mit Jeut See Tai would have to reveal zealously guarded Ngor Mei Sect secrets to Cheung 3 Fung. Would she do so?
Many interesting alternative scenarios spring up if Yu Doi Nam returns safely to Mo Dong with the Dragon Sabre.