We’ll be updating to 1.10 sometime this friday (24/06/16) and when that happens, we’ll also be regenerating the nether giving you access to all the new nether content that comes with 1.10 (and a fresh supply of nether quartz).
If you’ve got anything you’re particularly attached to in the nether (beacons, storage etc.), move it out before then or it will be lost when the nether is reset.