Conversation so far:
Can you tell me more about the reformation that took place from 2009-2014 for Blink 182?
Blink-182 appeared for the first time on stage together in nearly five years as presenters at the February 2009 Grammy Awards, announcing their reunion.
What lead to Blink-182 appearing for the first time in five years?
After a scare where band mates were involved in a deadly plane crash, Blink-182 got together discussing a reunion for the band.
What happened after Blink 182's reappearance in the 2009 Grammy Award?
Blink-182 embarked on a reunion tour of North America from July to October 2009, with a European trek following from August to September 2010.
How did Blink 182's reunion go?
The reunion of Blink-182 has been characterized as dysfunctional by both Barker and DeLonge.
What are some important things that happened regarding Blink-182's reunion?
Blink-182 planned to begin writing their seventh album in January 2015, which had continually seen delays.

Question: Why was it stalled?
Self-contained rewrite: Why was the the Blink-182 seventh album, California stalled?