So far your best bet for META-4 information is the M&M corebook (mostly visual info, but the Antagonists section details some villains), the SuperUnicorn website proper, and the forthcoming CROOKS! supplement.
I share your frustration however. With the bar being set quite high by M&M Freedom City, and Time of Crisis I'm eager to see what's next.
" We believe in heroes because ultimately we believe in ourselves. " -Jack Kirby.