Compatibility between AX 2012 FPK CU4 or AX 2012 R2 CU1 with MS Project Server 2013

Is there a expected date for the compatibility announcement from Microsoft for this subject, or is there a compatibility mode for Project Server 2013 to work as Project Server 2010  to be able to integrate with AX 2012 FPK and AX 2012 R2

thanks