The fallacy of argument to the future occurs when someone claims their argument is true because of the false assumption that the evidence is in the making, and it will soon be proven true.
Flat-Earthers are sometimes forced to concede that they cannot prove a flat Earth, but they believe it anyway because they claim it will be proven in the future. In reality, something like the shape of the Earth has been thoroughly proven to be a sphere. No amount of “research” will eventually prove a flat Earth.