Here is an overview of the game, via its official website:

About

Pitch, Slide, Slam, and Rally your way to Williamsport-glory as you compete to become the World Series CHAMPION of Little League! Become a Little League World Champ: Choose your team, then showcase your skills as you compete through the bracket to see if you have what it takes to be named the Little League World Series Champion. Or jump right into the action in an instant with Quick Play mode.

Key Features

• Play with Friends – Get together for exciting local multiplayer tournament action for up to four players. Customize the rules, select your stadiums and teams, and see who wins it all!
• Master Super Abilities – Use bonuses like Slow Time and Bat Tank to turn the tide of the game to your favor. Earn player-boosting stickers that allow you to build the most powerful team!
• Choose Your Style – Customize your team’s look, equipment, and batting style! Then get in the game with intense interactive plays, putting you in command of executing incredible slides, catches, hits, and more to give your team the edge and bring home the win!

Teams

• Awesome Possums
• Broadsides
• Cacklers
• Fire Scales
• Gryphons
• Heavy Lifters
• High Initiative
• Hyperxpress
• Incredibulls
• Jagged Smiles
• Knightly Knights
• Majestics
• Misfits
• Rolling Monsters
• Sly Rogues
• Spicy Chefs
• Striders
• Tricksters
• Wings Of Dusk
• Wonder Kids

Watch the announcement trailer below.