Under the "Statement of general direction" in the Announcement for IBM 64-bit SDK for z/OS, Java Technology Edition, Version 8 delivers new platform support (14 January 2015):

IBM intends that a future release of IBM CICS Transaction Server for z/OS will support 64-bit SDK for z/OS, Java Technology Edition, Version 8 (Java 8). This support will enable the use of new facilities delivered by IBM z13 which are exploited by Java 8, including 'Single Instruction Multiple Data' (SIMD) instructions for vector operations and simultaneous multithreading (SMT).

IBM's statements regarding its plans, directions, and intent are subject to change or withdrawal without notice at IBM's sole discretion. Information regarding potential future products is intended to outline our general product direction and it should not be relied on in making a purchasing decision. The information mentioned regarding potential future products is not a commitment, promise, or legal obligation to deliver any material, code, or functionality. Information about potential future products may not be incorporated into any contract. The development, release, and timing of any future features or functionality described for our products remain at our sole discretion.

I would expect more details when the next release of CICS TS is announced.

See the *Detailed System Requirements for CICS Transaction Server* for more information about supported operating system requirements, hardware requirements, software requirements, and other related information for CICS TS.