WWE has issued an official statement regarding Dean Ambrose's future in WWE. They have officially confirmed that the former WWE World Champion will indeed be leaving the company when his contract expires in April.
The following comes from WWE.com:
Dean Ambrose (Jonathan Good) will not be renewing his contract with WWE when it expires in April.
We are grateful and appreciative of all that Dean has given to WWE and our fans. We wish him well and hope that one day Dean will return to WWE.