If I had to throw a date out there, March 31, 2018.
3/31/18 = 3+31+18 = 52 (His death will be aligned with Super Bowl 52)
The date comes 55-days after the Super Bowl, and a span of 55-days before his birthday.
Again, his 76th birthday was 257-days before before the Super Bowl, the 55th prime.
Blood Sacrifice = 257; 257, the 55th prime; Sacrifice = 55
Blood Sacrifice = 67 / 76
The date March 31 can be written as 3/31, or 31/3.
331 is the 67th prime
313 is the 65th prime; Prince = 65
Prince and Bob are both Minnesota Musicians, with connections to Super Bowl 52.