Unfortunately there's not a single online hub for villains like there is for heroes. Ellie is in a Facebook group for villain sightings, however, so she does have pictures, however piecemeal. There are usually a couple small-timers like Lady Venom floating around, but Ellie is pretty sure Ruby will consider them all equally boring. As far as big organizations go, there are really only two in Philly: the mafia, and the Witch Riders, a biker gang.
The mafia is... the mafia. They do the same organized crime racket stuff, just now their enforcers are superpowered. Lots of villain capes wind up in their orbit just because they're so entrenched. Their current headliners are Blink, Skip, and Somnus. Blink is a teleporter, short range and line of sight limited but he can do a lot of hops very quickly. 'Blink and you'll miss it' is an appropriate reference. Skip is- kinda weird, no one has a good explanation for how their power actually works. Basically, they seem to choose whether or not they get hit by anything. Shoot a gun at them and you'll find the bullet in the wall behind them, throw a punch and their body is just half an inch out of reach, that sort of thing. Wide area effects seem to be their weak point. Somnus has sleeping gas for breath. Usually he wears a gas mask and tosses grenades he filled up earlier, but if pressed he can and will knock out an entire battlefield.
The Witch Riders are probably more interesting. They're an offshoot of the Warlocks, another biker gang. The current leader, Charybdis, apparently took offense to the Warlocks' white-supremacist, male-only ethos when she triggered back in the mid-nineties. The first couple years of her career were spent driving the Warlocks out of town entirely. The Witch Riders took over their place in the ecosystem, making some loose alliances with other lower-level gangs against the mafia and becoming more or less the opposing pole for the underworld to orient around. Charybdis herself is a hydrokinetic who makes tentacles of water to attack and defend, and drives around on a custom motorcycle designed to look like a sea monster. Her second-in-command is Salle, who makes forcefield cages of varying size, from just big enough for a person up to the width of a street.