I'm not a cartoon or movie aficionado, but I like stories that are character driven over a wide story arc. For example, I can draw upon the discoveries of Nikoli Tesla for the energy specialist, imagining him of Croatian descent with a calm composure, yet seemingly crazy to those around him - even members of his crew, and not necessarily because of his specialty. Bam! Instant tension with character arcs built in.
Why would these characters band together? It can't be just for fun or profit - they need an ideal. They need a belief to make them stick together through all the troubles they'd endure.
The greatest trouble I see throughout history is the belief that people can run your life better than you can and will use force to achieve that end. People take sides around this belief. Mind you, most tyrannical lackies and their serfs believe force is justified, but that's what makes it interesting - both sides believe. The outcome is decided by whose beliefs are stronger.
The current idea is the Freedom Fighters develop tech and aid the oppressed. Since this is science fiction, the story isn't restricted to humans... or Earth, time, space, or dimensions for that matter. Quantum physics could be an interesting way to play out battles.
However, what if the team thinks the oppressed is the oppressor? Or the oppressed is being played by the oppressor? That would put kinks into the team's credibility, especially towards the Leader, even from within the team. Team members may become skeptical of new clients, or worse, skeptical of their leader, further fracturing the team, then sides are taken... oh, the story potential.
When characters are introduced or removed as the adventure unfolds, it creates new opportunity to shake up the team. It may occur due to curiousity, natural interest, opportunity, burnout, rejection, a change of heart, a new love, betrayal, birth, or death - the list goes on.
With this in mind, I imagined a smaller crew, perhaps early on or after they've lost former crew members. Being idealistic, they may mismanage affairs and desire someone better to interact with the public, so what better way than to juxtapose a posse of strong willed heroes against a petite woman to boss the crew around and keep them on task and on time? Some team members may not like this new style of running their House, or project skepticism from the Leader onto her, which pits the group against itself. Will it break the team? Will bad behavior become worse? New behavior develop? More tension, more story...
