How different would the Tolkien Universe events proceed if Samurai Jack replaced a few key forces?

1: He storms Isengard instead of the Ents

2: He has to defend Helms Deep solo until the Rohirim arrive

3: He fights Smaug solo in Lake Town. No Black Arrows.

4: He arrives to help Gondor instead of the Rohirim

5: vs. ALL the Nazgul

6: vs. The Balrog

7: vs ancient Silmarilion era opponents