I have fixed many of such broken ones. Dilute PVA glue using water (approximately 75%glue and 25% water) to decrease its thickness. Buy a plastic syringe with a thick needle and fill it with your diluted glue. Open the crack using a thin knife so that the glue could reach all of the broken area. Inject the glue using the syringe. Take a packaging tape and wrap it very tightly to close the crack (let the glue ooze out of the crack). Leave it for 48 hrs and take off the tape. Sand the extra glue off and apply a new, good quality scuff sheet. The bat will be ready to go again!