As far as you remember, in Revenge of the Sith, Mace Windu personally arrived at Palpatine's office in order to stop him. After the duel won, Windu was about to kill Palpatine, but Anakin came, who ruined everything by cutting off Windu's hand, after which he was thrown out the window by Palpatine.
However, it's unlikely that Samuel L. Jackson will reprise the role. Despite surviving in alternate reality Star Wars stories, fans shouldn't expect Mace Windu to return in the main continuity. Other Star Wars projects have come and gone without including him, suggesting his fate is final.
Conflicted, Anakin first revealed to the Jedi Council that Palpatine was a Sith Lord and then helped Palpatine kill Mace Windu in the hopes that Palpatine would teach him how to save Padme. Though distressed by his betrayal of Windu, Anakin submitted himself to his new master, who in turn dubbed him Darth Vader.
Likewise, the old man also shares that the end of the war saw him being hit by lightning before falling from a tower, the same way Mace Windu met his alleged demise in Revenge of the Sith at the hands of Palpatine. However, the shogun survived despite going blind, receiving a vision to find a lost temple.
And there's a long history of one-handed Jedi. So why not?” Jackson went on to say that he also shared the theory with George Lucas, who replied, “I'm okay with that. You can be alive.”
The following year, a Duros sold a broken lightsaber, which he claimed once belonged to Master Windu, to Senator Sano Sauro. Though the claim was never verified, Senator Sauro displayed the lightsaber in question in his office.
Mace Windu appears as a Force ghost in the alternate history comic Star Wars Infinities: The Empire Strikes Back in a vision to Darth Vader, though this may only be a mental vision in Vader's mind as opposed to an actual Force ghost.
What if Anakin killed Palpatine instead of Mace Windu?
Anakin Wouldn't Become Vader & The Sith Would Be Destroyed
Having already earned the trust of Mace Windu by revealing to him the truth about Palpatine, Anakin would solidify this trust by helping him defeat the last Sith Lord.
Mace Windu. Now, Snoke is not the Emperor, he's a mere clone of him, a puppet. However, this does not mean he's weak. The Supreme Leader has great knowledge in the dark side and has perform a few feats of his own and was almost near Palpatine's power.
According to Imperial Estimates in Star Wars Inside #87, only about 100 of the Jedi survived Order 66. Most were subsequently hunted down and killed in the years following the Great Jedi Purge.
Windu bested Palpatine in the confrontation and—deciding the chancellor was too dangerous to be left alive due to his influence over the government—prepared to strike him down, but the intervention of Anakin Skywalker, who betrayed Windu and saved the chancellor's life, led to Windu's death.
It became seen as a gateway to the dark side, with some choosing to practice it in secret. Remarkably, Mace Windu is only one of a few Form VII users who didn't fall to the dark side thanks to his refining Juyo into Vaapad.
The term “gray Jedi” in Star Wars is somewhat of a misnomer, considering that the definition refers to one who is practically non-Jedi. That being said, quite a few Jedi can be placed into this category. But Mace Windu identified as a Jedi despite his possible inclusion in the "gray" category.
In material that is now considered Legends, Qui-Gon is even described as a Gray Jedi. Additionally, the term has also been applied to Force-sensitives who aren't affiliated with the Light or Dark side of the Force. Quite literally, these Gray Jedi don't see things in black and white, or light versus dark.
In a galaxy filled with lightsabers of various colours, the Darksaber stands out as the rarest lightsaber colour, shrouded in mystery and steeped in history. Created by the first Mandalorian Jedi, it has passed through the hands of warriors, terrorists, and heroes, leaving an indelible mark on the Star Wars universe.
Unlike most of Revenge of the Sith's Jedi casualties, Star Wars never showed Mace's body, which means that a chance exists for him to have survived in some way. Although it didn't happen in Obi-Wan Kenobi as some fans hoped, Mace Windu could potentially turn up alive at some point in the future.
Traditionally, yellow lightsabers are associated with Jedi Sentinels, who balance their combat skills with a strong focus on exploration and practical application of the Force. This choice reflects Rey's well-rounded training and her determination to maintain balance in the Force.
Yes. This is going to be unpopular, however, it's fairly clear from various sources, including Lucas himself, that Palpatine did let Mace Windu win. Lucas himself noted during hos commentary on the film But this part where he, he pretends to lose his power and be weak was something I added later.
Darth Vader. Mace Windu can obviously put up a somewhat decent struggle, but he can't win, nor is he Vader's equal. Basically, Mace Windu might have two advantages against Vader, his Vaapad and his shatterpoints awareness, not only against Vader, but against most darksiders in general.
Only three Jedi/Sith in Windu's lifetime ever surpassed him, (Darth Sidious, Master Yoda, and Anakin Skywalker) and all three just so happened to be candidates for “most powerful Force-User in the Republics' 25,000 year history” at various times.
