The issue with mission creep has long since been resolved regarding fusion.
The problem with fusion is two fold.
1. The magnetic bottle to contain and control the fusion, is restricted in usefulness due to the large amount energy required to create it.
*The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system.
*The second law of thermodynamics states that the entropy of any isolated system always increases.
*The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.
Any discussion of known science regarding contained fusion is therefore tied at the hip to near or actual room temperature superconductor research. In short, viability is dependent upon getting more energy out of it than is used to produce it (contain the reaction). Either throw more energetic fuel at it, or increase the efficiency of containment.
2. Fuel-The best fuel is also the rarest. That being helium-3.
Tritium is a radioactive isotope of hydrogen and is typically produced by bombarding lithium-6 with neutrons in a nuclear reactor. Tritium decays into helium-3 with a half-life of 12.3 years, so helium-3 can be produced by simply storing the tritium until it undergoes radioactive decay.
Due to the rarity of helium-3, deuterium was the focus for fuel in research since the 60s. That carried all the way until around 2005. Then rumors of Chinese efforts focusing on He3 began to surface.
Then in 2007 this surfaces;
Ouyang Ziyuan, a geologist and chemical cosmologist, was among the first to advocate the exploitation not only of known lunar reserves of metals such as titanium, but also of helium-3, an ideal fuel for future nuclear fusion power plants. He currently serves as the chief scientist of the Chinese Lunar Exploration Program. Another scientist, Sun Jiadong, was assigned as the general designer, while scientist Sun Zezhou was assigned as the deputy general designer. The leading program manager is Luan Enjie.
The jig was up when that hit the streets. Over the last decade, more and more information regarding China's fusion research efforts have surfaced. They are now at parity with the west and moving past in that regards.
A lot of folks questioned and still question recent big talk out of the west regarding its recent efforts to return to the moon. Now you know why. You also know why the focus has been on location of ice on the moon as H2O, more importantly the H - hydrogen is the base of tritium, which is the base of helium-3 (beta decay of tritium).
The Chinese are focusing on remote operations from low earth orbit for lunar activities. Those lunar activities are focused on remote extraction of materials. Putting a Chinese boot on the moon is only a tertiary goal.
Bottom line is, no more than 25 years from now if the world doesn't blow itself up. You can rest assured the Chinese won't screw around with this as they already smell the end goal. The west can either get their heads out of their collective arse or be left behind.