Does Linkin Park have a unreleased Album


Songs recorded in 2014 and 2015 such as Cant hurt me, Dark Crystal, Air force one, and Burberry have been included on LPU albums, songs such as All our days, Spirals, Hands Itch, last straw, and I hate the world right now have been mentioned to be made sometime in 2015 while Chester was recovering from a broken leg. Also during this time Linkin park made Darker Than Blood with Steve aoki and Waiting for tomorrow with Martin Garrix. During this time many people thought linkin park was going to release their 7th studio album sometime in 2015 but it never happened until 2017.

Was Linkin park planning to release a album sometime in 2015?
If they did have a 2015 album why did they not release it?