Mad thought- the changes to the world of For All Mankind
brought about the Space Age allows for the genetic engineering required for Khan Noohan Singh and other 'supermen' to rise in the 90's, with the Wars against them starting in 1992. The Augments/Khanate is defeated by 1996 and, though unknown at the time Khan feels Earth in the ship the European/Commonwealth ship built in Australia to take part in the Mars race.
How might the Eugenics Wars
effect our characters?
The race to Mars that took place in 1994 is likely delayed as resources are moved elsewhere.
The Polaris Orbital Hotel built 1990-92 might still happen as its a private company, but the opening in 92 is possibly delayed due to the war- could the hotel be seized by the US Military or the Khanate as a orbital base?
Kelly Baldwin born as Nguyen Thi Hanh is a 1996 birth in Vietnam, so she is likely butterflied away since the war seriously effected that part of the world.
Does Ellen Wilson win the Presidency nomination in 1992?
I could still see the JSC bombed in 1995, possibly even by the same group for the same reason, but it will be blamed on the Khan not domestic terrorists.
Not sure if Margo would quit as Flight Director or if Sergei would make it out of the USSR in this changed world. Possible Margo goes out with the bomb so Aleida keeps her suspicions about the spy quiet.
The Mars Race might become a 'feel good' event in the aftermath of the Eugenics mess so launching around November 1996 since the Khanate collapses in June.