In 1471 Wladyslaw of Poland was elected King of Bohemia, while the title was also claimed by Mathias Corvinus.
But One of the other claimants of the crown was Albert of Saxony, the son-in-law of George of Podebrady.
Albert marched to Prague OTL ( to protect the election against Interference, among other reasons).
What Would for Albert to become King of Bohemia or for George to name him succesor instead of the polish Prince?
A Saxon Bohemia? That sounds pretty cool. AFAIK, the Hohenzollerns were pretty chummy with the Jagiellons for the same reason that the Wettins got into bed with the king of Bohemia (they feared Matthias' expansion as a threat to their lands). Now the Wettins and the Hohenzollerns were sort of rivals - which is sort of what kickstarted the Reformation in Germany (Albrecht of Mainz needed money for bribes to be elected archbishop of Mainz), then once he got elected, he needed to recoup the losses and the pope allowed him to sell indulgences, which turned Luther off etc (this is sort of the barebones version). Which means that a succession war might spill over into Germany. The difference being, Matthias and Albrecht/Olbracht are both "relatives" of the late George, while Wladek is nothing (technically), although he is the nephew of the later king, Ladislav the Posthumous. Both Matthias and Albrecht were married to George's daughters (IIRC). Matthias' wife (Katerina) had died and had no children by her; whereas Albrecht's wife, Sidonie (Katerina's twin) had several kids who survived infancy (boys included). Not to mention, Albrecht was the Emperor Maximilian's cousin, so Max might be more comfortable with the idea of such a person being elected king rather than the Rex Bene.
What it would mean for Bohemia, I'm not sure But as I said, it could be interesting. The Albertine line doesn't control the electorate yet, and in such a situation - if they can hang on to the Bohemian crown and all other things following OTL more or less - Karl V won't remove the Saxon electoral vote to the king of Bohemia here. However, it
does mean that one family controls
two electoral votes, which might be more problematic in the 15th/16th century than it was in the 17th/18th when the Wittelsbachs held electorates of Bavaria and the Palatinate.