Both ships feature what are meant to be top-secret temporal systems allowing the craft to do weird things to the flow of time in combat, as well as serving in a support role on the field of battle. There’s no precise timeframe for the release of these new ships, but expect them sooner rather than later.
On a wholly unrelated note, you can also play some random task force operations with the developers on Wednesday if you’re keen on playing on the test server.
Source: New ships, Random Task Force Oprations