As far as I could tell from the huge pile of decklists, here are all the archetypes that are represented by more than one player at $10K Madrid.

Curve Sentinels – 28
Teen Titans – 15
Common Enemy – 10
The New Brotherhood – 9
Spider-Man – 8
The Brave and the Bold – 7
Big Brotherhood – 7
Doom – 4
Fantastic Four Beats – 4
Marvel Knights/Fantastic Four – 4
League – 3
X-Stall – 3
Fantastic Four Burn – 3
Evil Medical School – 3
Gotham Knights/Fantastic Four - 3
Cosmic Cops – 3
Doom/Gotham Knights – 2
Doom/Fearsome Five – 2
Superman/Brotherhood – 2
Heroes United – 2