Who's the Sidekick Again?

This is a fairly simple and reliable Sidekick deck for Spider-Woman. It doesn't go full Voltron, but once it's set up it keeps Captain Marvel around for her solid stats and her fantastic ability to draw you cards.

The ideal way to get Captain Marvel into play (other than just drawing her) is to start your turn with a double resource, Suit Up, and at least six cards in hand. Unless the scenario gives you a push, this means being in alter-ego. You do have excellent opportunities to hit this later in the game through Pheromones or Upside the Head, but if you can get it on your first turn that's obviously preferable so you should mulligan hard for such a hand.

If you hit that hand, use your double resource to play Suit Up and grab Captain Marvel and Sidekick, then spend the rest of your cards to play Captain Marvel. After activating her (or if you have a Finesse in play) you can play Sidekick on her.

Spider-Woman's kit is generally strong, especially in locking down the villain, which makes it easier for Captain Marvel to do her thing. The Sidearm will help her avoid Retaliate damage and gives her a little extra oomph in her attacks.

If you're willing to make the deck a little less reliable in exchange for a beefier Captain Marvel, you can trade some other Leadership cards for more upgrades for her. Inspired and Power Gloves are both great for her, and the deck can make use of Mighty Avengers if desired. If you want more allies Kaluu synergises well with Spider-Woman, but there's obviously no lack of good Avengers Leadership allies.

On the Justice side, you can cut Upside the Head for more thwarting if required. As you should flip a lot to make use of the Sidekick card's ability to heal Captain Marvel, Lay Down the Law can be a solid choice. If you face a lot of side schemes, Multitasking can also be very good especially since you have easy access to wild resources for aspect cards through Finesse.