The following CRM 2015 exams are now available:
MB2-706: Microsoft Dynamics CRM Online Deployment
MB2-707: Microsoft Dynamics CRM Customization and Configuration
The exams can be already scheduled and until 31 May 2015 there is also the Second Shot offer, meaning that you can retake the exam for free if you didn't pass the first time.
All the Dynamics CRM 2015 exams are listed here:
Dynamics CRM 2015 Certifications