A new technology, or an alien tech weapon would be most invaluable. The materials or some would be unknown to us (not found in our reaches of solar system) like in predator 2 with unknown materials. This could be so rewarding for discovering potential reactions/potential propulsion systems.
We don't know how the pred gun fires. There are people working on developing gravity guns which can manipulate gravity for propulsion purposes (star ships). A find like a predator weapon would change everything, especially judging from the strange material shot from it and able to be charged or stored in the gun or the pack.
This would give rise to a new generation of batteries and efficient storage, a myraid of possible chemical reactions and could possibly lead after analysis of materials to discovering a branch of unknown elements via nuclear reactions.
Seriously the possibilities would be almost endless from something like that. Open your minds people.
plasma rifles? shit Hudson was talking about. This matches perfectly.
If they could develop a better system of propulsion or energy storage from the predator weapon, which I think is highly likely we could easily see the next generation of space shuttles.
Hmm I want one