Terra featuring New Havanica

Campaign setting for a Dungeons and Dragons 5E role-playing group, of which I am DM.   The main hook is twofold: It's a Dungeons and Dragons world updated to the 21st century, and there's a main city where lots of different races and political factions interact with one another. This city is called New Havanica, and it's the primary setting of the campaign. The world revolves around this site, in part because of its massive historical significance and in part for more mystical reasons. Irregardless, it is the main stronghold on the front line of the war between the material plane and the outer planes. But that's not to say that the material-plane powers that divide the city aren't also frequently opposed to one another.   Technology has grown and evolved a great deal in the last few hundred years, up to and including the development of computers, cars, airplanes, television, the Internet - it is based on the Unearthed Arcana: Modern Magic release from 2015. The one exception to this is bio-technology, where analysis of a wider variety of creature types, including some that border on or are magical themselves, has allowed leaps and bounds above what was previously possible. This allowed for the development of super-soldiers: men and women with incredible strength, durability, and powers. This advancement led to a great war wherein a number of these scientists sought a way to wipe out the study of magic.   The world has a proud tradition of mighty, larger-than-life champions, including the Miracle Champions of the 5490s, but most recently manifest in the Vigilant, the currently active guardians of New Havanica, and, when necessary, civilization as a whole. The Vigilant are supported by a number of official and unofficial forces in New Havanica, from the police to elvish guards to gangsters to superhumans. This is where our story truly begins: with half a dozen scrappy young heroes who have joined this loose coalition.   Annastrianna. Thorin Ironfist. Carrie. Erryn. Serafina. Smelf. Hormiir. Miranda.   For now, they are just cogs in a much larger machine, but with even the forces of civilization torn apart by internal strife, and darkness on the horizon, a far heavier burden may soon fall on their shoulders . . .