I am offering you two 2020s:
1. The Iran diplomatic crisis fizzles out but corona causes a pandemic (the actual time line), or you can hit the reset button and
2. Coronavirus is stamped out at 100 cases early on in China because the whistle blowers were taken seriously, but the Iran crisis escalates to the point where it turns into a total war involving most of the world's major powers, with nuclear weapons used
1. The Iran diplomatic crisis fizzles out but corona causes a pandemic (the actual time line), or you can hit the reset button and
2. Coronavirus is stamped out at 100 cases early on in China because the whistle blowers were taken seriously, but the Iran crisis escalates to the point where it turns into a total war involving most of the world's major powers, with nuclear weapons used