Giant sandworms? It must be THE FUTURE!

So I've been thinking about the far, far future of Inmortalitas again (i.e. the time of Marathon 2's ending), sparked by two things: a weird dream about a Marathon/Starship Troopers fusion, and suddenly having more Dune books than we did previously.

Short version: my idea of Marathon's distant future is heavily influenced by what I know of Dune, and the works of Moebius. The following obviously isn't all of my half-formed plans, just a smattering.

( Disclaimer: may not contain as much sandworm as advertised. )