Epic Story Toys is led by Kim Morris and will be at the Nuremberg International Toy Fair later this month.
The new partnership will see Epic produce a 2D-animated series that will launch on YouTube Kids this summer.
Subsidiary Brown Bag Films will produce new animated series for the Judy Moody and Dasher picture books, with Trustbridge managing licensing and merchandising.
The new preschool series from Arthur creator Marc Brown will debut in Canada next year.
The planned acquisition of the Connecticut-based toy company is expected to help Spin Master tap into the sustainable toy market.