Salut!
I'm really glad that markings of Czechoslovakia are already being suggested. It is very important plane in our history, with more than 1400 individual fighters and additional 2000+! twoseaters ever produced here, not counting upgrades and conversions. Eduard really put together nice representative paint-schemes and I hope we will find at least one in the sim.
The first 613234 from 1957, sporting blue lightning is great! In some materials it also appears with red lightning at some point, similar to #3233, like here:
I also liked this tricolore Bis of 1964's Sliac airshow and for the curious,
is the YT black and white document of that airshow:
However, the blue-silver checkered 141303 (1958-1964) in the post above is not Bis (Aero S-103) version, but rather earlier Mig-15 (S-102) for those considering absolute historical accuracy, despite it being one of the most unique ones.
For more information regarding each marking and more combat-oriented ones (with nice background info in english), you can visit the pdf manual of the kit here. Hope it will be of some use. I for one, can't wait to see!