George Lucas cut a very different version of the fight between Obi-Wan Kenobi and General Grievous in Star Wars: Episode III – Revenge of the Sith. One of the most dangerous Separatist leaders, General Grievous was introduced in Star Wars: Episode III – Revenge of the Sith as a particular threat to Obi-Wan Kenobi, the Jedi assigned to take him down. Viewers have recently become a lot more interested in General Grievous, though, because it's becoming clear Lucas toyed with other ideas for the character. It's recently been revealed General Grievous was originally intended to be a resurrected Darth Maul, giving a much more personal reason for Obi-Wan to take the Separatist leader on.

https://screenrant.com/revenge-sith-george-luc-obi-wan-grievous-fight-cut/