In Ninja Turtles 1 (1990) regular Shredder is crushed in a trash truck by Casey Jones, but not before a battle with the turtles and splinter, but in Ninja Turtles 2 (1991), super Shredder is simply buried in rubble from the pier falling in on him after he decimated the pillars, no fight what-so-ever. Why did the producers/director decide to end shredder in this fashion? It was far too simplistic especially compared to his defeat in part 1. It seems like such a cop-out especially considering the potential for an epic battle scene.
Not only that, why did he survive from part 1 to part 2, but not from part 2 to part 3 when his defeat was so simple in part 2?