Animal Crossing as a Tropico-like economy management and city-building game: you scale your way up from low-level gathering tasks as you cultivate relationships with the villagers, developing fruit farms and sustainable fisheries and logistics services in a multilevel chain of production where your animal friends can find employment in tune with their interests and skills. Then you funnel the profits back into housing developments, public works, and beautification projects that attract more villagers to your town, not capped at the usual handful but up to the dozens or even a hundred. As with fruit trees in the existing game, you can establish trading relationships with other players online based on pricing disparities over what you are able to cultivate locally.
The endgame objective, as before, is ultimately to furnish your own mansion and customize the aesthetics and layout of the town to your own liking. But the idea is to take the town-building in New Leaf to its natural conclusion and develop an economy layer that is a little more involved than watching the turnip prices, a system that has yet to move forward from the original AC.
Meanwhile, I love the world, aesthetics, character design, and overall sense of movement in Overwatch, but as a competitive FPS most of this is wasted on me. Render it as anything else, really, from a turn-based squad strategy game like Code Name: STEAM (which would actually involve overwatch) to a 2D tag-team fighter.