Starting points for the PLC

Afer an overly long hiatus, I have been busy doing readings and research of historical events and rules. In my meanderings to find a way to restart my Imagi-Nation, or maybe more accurately alt-history of the Polish Lithuanian Commonwealth I composed a list different possible starting points where the self-destruction of the PLC could have been avoided.
I came up with the following list:

• Battle of Sandomierz
  the King of Sweden and his exhausted army are surrounded by a superior polish force. Short on supplies, food and ammunition, they were historically able to break through and get to safety. Could we capture the Swedish King in a wargame?
  
  
• 1657 Entry of Denmark and Austria into war, retirement of most Swedish troops from Poland. could be used a a point of not allowing Brandenburg to rechange alliances (again!) and retake Ducal Prussia for Poland.
  
  
• Enforcing treaty of Hadiach
  Supporting the cossacks and creation of  Tristate Commonwealth
  
  
• 1659 Lubomirski Rokosz -Battle of Matwy
  Could the Royal forces not defeat Lubomirksi's rebel forces, giving them a stronger hand in the final negotiations and stating a reform of the Commonwealth
  
  
• or as already initiated in 1696
  as a sucession campaign scenario, getting 2-3 royal contenders to gain points on campaign to see who will be the next King

Mons Rei Publicae Polonae (Allegory of the state of the Commonwealth during the reign of Stephen Báthory), 1578. The composition presents the vision of the Polish state standing by the King and the Church, in line with the popular lex-rex rule of the executionist movement.

Since Sandomierz, seems the most interesting and first I will aim to recreate this first. if the historical outcome repeats itself, I can always aim for any of the other divergence points later on.

On with the show!