Order of likelihood
2) He was assassinated on Putin’s orders. 95%
4) He faked his own death in order to avoid capture. 3%
1) It was a legit plane wreck, an accident. 1%
3) He was assassinated on someone elses orders.1%
5) He’s alive somewhere, in custody, wishing he were dead. 0%
6) He was actually in cahoots with Putin on some deep plot within a plot and he is currently OK, and under Putin’s protection. 0%