It seems there is a mix-up in your statement. Richard Wagner was a German composer known for his operas, particularly for works like "The Ring Cycle." He did not compose "The Planets" or "The Four Seasons."
"The Planets" is actually a suite composed by Gustav Holst, while "The Four Seasons" is a set of violin concertos composed by Antonio Vivaldi.
John Williams, the renowned film composer known for scores like those for "Star Wars," "Jaws," and "E.T.," has indeed acknowledged Wagner's influence in his composing style, particularly in the use of leitmotifs and orchestration.
If you have more questions or need further clarification, feel free to ask!