League of Legends - third book to Damsel on Distress

"League of Legends assemble . . . or whatever."
It's been two months and there's been no sign of the infamous villain, Nemesis, until superheroes around the world start to go missing.
The secret agency MASKED knows that there is only one group of heroes fit for the job of figuring out what happened to the heroes . . . and save the city from a massive robot invasion.
Sonic can run at the speed of sound, plus some. All she ever wanted was to live a normal life away from the publicity of her father becoming mayor . . . until now.
Calico and Tornado are still off fighting secret wars for MASKED and The Marvel and Blue Archer are off fighting small crimes in Empire City . . . until now.
White Static was just an underappreciated sidekick . . . until the super he works for goes missing under mysterious circumstances.
Can this group of misfits get along just long enough to fight off a faceless villain who might be closer to home than they'd originally thought?