When will Magento 2.0 be available with Elastic Search?

We anticipate that Elastic Search will be included in the Magento Enterprise Edition 2.1 release scheduled for the first part of 2016.

New Magento Enterprise Edition 2.1 features will include:
New Elasticsearch - A shift to the leading open source search technology, Elasticsearch, gives merchants the ability to easily handle large catalogs and scale up search functionality as traffic increases, is easy to configure and delivers high quality results.