This could be dismissed as the bored imaginations of fans who wish Tupac was alive or those crazy conspiracy theorists who will believe anything because they are all so quick to believe anything.
Well this site explains it better than I can so i shall give you a few links to read.
http://www.konformist.com/rocknroll/tupaclives.htm
Also.
http://ontological.unn13.com/tupac.html
Did the Illuminati kill Tupac? Was Killuminati a reference to stopping the elite?
http://www.alleyezonme.com/articles/12.phtml
Also something i noticed the other day was in the "hit em up" video. Edi is wearing a black shirt with the number 13 on it. There is a lot of this type of stuff. Was Tupac a self fulfilling prophecy or was it something more?
What became of Kadafi?
http://www.thugz-network.com/Outlawz~Kadafi.php