When Revealed: Each player searches their deck, discard pile and hand for a hero-specific ally and places it facedown beneath this scheme. Place X threat on this scheme where X is the total cost of all allies beneath it. Each player shuffles their deck.
When Defeated: remove this scheme from the game and return each ally beneath it to its owner's hand.
Something interesting for this card as our cardpool grows. Identity specific ally.
The list of heroes that do not have an identity specific ally are
Venom
Spider-Man (Miles Morales)
Groot
Ghost-Spider
Rocket Raccoon
Cable
Storm
So those characters are essentially free to ignore this side scheme.