My debatable! theories

The confusion for me is – Turnbull, are you saying? whilst “Roth had to have been thinking and been fanned when Roth couldn't get his hands on Michael's $2M that he [Michael] might suspect Roth was behind the Tahoe shooting” however did not twig Michael was planning to murder Roth [and Ola]

Sure thing Michael's “Who had Frank Pentangeli killed?” set Roth off on his soliloquy and the charade finally exposed
Quote
So when he [Greene] turned up dead, I let it go and I said to myself, this is the business we've chosen I didn't ask who gave the order because it had nothing to do with business
I am not sure “Roth was telling Michael to let the failed Tahoe shooting go” I believe Roth was telling Michael to let 'dead' Pentangeli's order go, same as Roth let Greene's order go

It seems Roth and Ola didn't even suspect, there is no indication that they had figured they will "never see the New Year" nor “he [Michael] might suspect Roth was behind the Tahoe shooting”

Otherwise Roth and Ola would not have been so slack, sitting ducks considering how Michael's bodyguard, Bussetta was able to just walk into Ola's hotel room and killed him Then Bussetta almost killed Roth

That was No Heart Attack
Originally Posted by Lana
I don't think “he [Roth] held out way too long” to whack Michael in Havana

I believe, Michael's any unexplained violent death other than the meticulously planned, carefully considered and arranged, after the New Year's Eve Presidential party, caught up in the midst of the rebel uprising in spite of being escorted in a military car, can be fraught with problems, not as 'believable' and would certainly raise suspicions why Michael was the only one killed

I also believe there was no “greed” Roth was not “desperately trying to buy time / holding out for the $2M” [Michael was all set to be “whacked after midnight” with or without the $2 million] but of course if the money fell into Roth's lap, Roth will take it Bonus! and use Michael's own money or part thereof to pay for Michael's own murder Poetic justice indeed and revenge made sweeter!