Hello it's nice to meet you now I also predicted Shao Kahn will win the next death battle. To answer your question about Bison's soul trying to take over Kahn's body. He was able to maintain Blaze's soul whose the safety guard in the final battle. A powerful being created by the Elder Gods to even this battle out. However that didn't happen which lead to Shao Kahn finally conquering all realms. So he should be able to fight Bison inside himself.