Greatly exaggerated rumors

I'm often not completely up to date on the pop culture scene, but is this related to this?

I suppose it's not that far a leap from:

Tupac Shakur was the star performer at the first weekend of this year's Coachella music festival in California — despite the fact that the hip-hop legend died more than 15 years ago. The late rapper surprised, delighted, and creeped out the crowd by appearing through a convincing, though slightly unsettling, hologram alongside the real-life Dr. Dre and Snoop Dogg.

to

The concerts will feature projected vintage video of Denver performing, backed live by members of his original touring band and an accompanying string section. For the first time in fifteen years, audiences will experience John Denver in concert, performing hit songs from throughout his career.

I can see how inquiring minds might make the connection, but it does lead me to wonder: do you have to wait 15 years first? Is there actually some legal expiration-of-rights reason why both events occurred exactly 15 years later?

Or did the unexpected success of the first just inspire the second?

And are there more such?

Is there a Michael Jackson hologram tour?