A simplification of Fusion wars that would have a chance at implementation and playability.
Players perspective:
It is a company simulator. You have no GUI to look around, just some screens with graphs and numbers.
Players see a window for:
market share,
popularity (people know about),
credibility (people that know believe in it),
amount of fusion FUD in the news,
reactors running and info (V1, V2, wear and tear, efficiency, sabotaged… etc)
technology development (v0, v1),
fusion labs information (rooster, status, work),
investors list and status for each (fearful, satisfied, greedy),
Events list (Germany bans fusion development to protect their renewable energy market),
In each window they can observe the information or make some actions (raise money, build reactor, release PR). And see what events happen in the charts or events window.