T shirt design

I'm looking to create 2-4 t-shirt designs with an inspirational/motivational theme. The primary color palette should be neutrals. I'm looking to offer these designs as part of a collection, and want them to be unique and eye-catching. The shirts should be fashionable and made with quality materials. We have a logo and want to do some variations of it for tshirt design. Our logo is a Lion as attached. We would like to do a kids shirt/rash guard and adults as well.