I've been hooked to paradox' grand strategy games after trying out Europa Universalis III, still enjoying Victoria and Crusader Kings. But, what about a sci-fi/speculative history grand strategy game set in the 21st century?
The game starts in 2012, modern-day world, letting the player lead a nation to the onset of the 22st century and through such challenges as managing increasing global population, struggling with resource-scarcities, balancing growing corporations and social welfare, choosing between democratic and authoritarian paths, racing to establish first colonies on moon and mars.
Victoria II introduced a very interessting system of economy and manufacture, Crusader Kings II a system of characters, their ambitions and schemes. This game could combine and expand on the two. The characters (CKII) turn into interest groups: major corporations, trade unions, sectarian religious groups, human rights groups, greenpeace for that matter. They all press the government, have their plots of buying votes (in democracies) etc etc. And lets not forget nationalists who try to tear Bask-land from spain or Northern Ireland from UK, for example.
Victoria had a focus on economy, Crusader Kings on war and plotting. This game should have focus on internal and external politics and economy. How do you manage a nation? How do you reconcile conflicting interests of all the groups? How do you create an economy that is competitive in the 21st century, which treaties and alliances you make to get access to strategic resources? Do you support the aspirations of a new break-away nation, and discover nationalists in your own home inspired or do you refuse to acknoledge a new nation and face international condemnation? Do you keep Antarctica independent, or enter an alliance with other powerful nations to carve it up and exploit it?