The pro-justice covert rodent group, Anonymouse, hacks the Rat Mob?s plans, but when the Rats get wind of the hackers the mice must scurry underground to prevent the rat mobsters from following through on their nefarious baby mouse smuggling ring.

Lay off the mouse, rat stuff. The story needs to work without it. Sure, the concept of an animated mouse/rat cyber/hacker thing is great. But “just because it’s animated mice” won’t save a poor story
(See, Dreamworks vs. pixar).
I’m sure you’ve put in the hard-yards and your story is great. Just work on your logline.
“A group of computer-hacking mice must prevent a team of rat mobsters from mouse-trafficking [or else…]”
Gets the story, and your Unique Selling Point across.
Instead of ramming “IT’S ANIMATED MICE AND RATS” down their throat, the reader says “Wait? Is this… like actual, animated mice, and rats? TELL ME MORE!” And your foot is in the door (send them your one page synopsis. If they like that, they’ll ask for the script!)

Second point… you’ve got an ensemble piece here. Which is OK. Indeed. Fine. But… you *may* find it easier to focus on one character hero. remember Ratatoille (sorry, but it’s what came to mind.). It wasn’t “A team of rats help a chef”, it was “ONE RAT… helps ONE CHEF….”.

Rattus Bickle? (No. Not funny, TOASTMAN, Stick to what you’re good at)

OK, think of it this way. A group of mice must save some baby mice. Sounds “Meh”

OK. Now, “SARAH mouse, must save HER BABY BROTHER BOBBY MOUSE, from evil rats or he’ll BECOME A SLAVE” – More powerful and emotive, yeah?

As always, listen to RicheV. He has the number “668” next to his name, not because he lives next door to The Beast, it’s because he reads a lot of these, and tends to know what he’s talking about.