Conversation so far:
Can you tell me more about the reformation that took place from 2009-2014?
Eventually, the band appeared for the first time on stage together in nearly five years as presenters at the February 2009 Grammy Awards, announcing their reunion.
What led to them appearing for the first time in five years?
CANNOTANSWER.

Question: What happened after the band's reappearance?
Self-contained rewrite: What happened after Blink-182's reappearance?