Having watched the previous film before embarking on Zack's version I can see a great deal of improvement. Zack has the ability to make a beautiful story before a big finale which is seen in his movies such as Man of Steel, Batman V Superman, and the watchmen. The only problem is that some of his action scenes are not that much amazing, especially big finale fights. This was however not the case as this Justice League had a far greater improvement from Batman V Superman. Almost as amazing as Man of steel.
This was a great film and hope he continues the Justice League or warner bros to give him the opportunity to. Also, I actually liked the movie being 4 hours, hopefully, the next one can be as long.