Have Daniel Logan play Boba for the first two seasons and have Temuera Morrison play Boba Fett in the third and final season. Each season would be an important part of Boba Fett’s life. 

First season should be about Boba during his early bounty hunting days, getting his crew together and doing the Bounty Hunter arc from The Clone Wars. It is pretty obvious Season 7 is just gonna be about the Siege Of Mandalore. So I think it’s best to have season 1 be about Boba Fett’s rise as a bounty hunter, you could even throw in flashbacks with Jango and end the season with his duel with Cad Bane.

Second season should adapt Boba Fett’s rise in infamy as the best Bounty Hunter in the galaxy, you could even adapt 1313 for this particular story. We could also have an arc of Boba teaming up with Bossk, IG-88, Dengar, 4-LOM and Zuckuss during The Great Hunt. I’d go as far to say that we should include Han Solo for the season finale, that way we can bring back Alden to play Han and have it be revealed thatHan Solo and Boba Fett have a past. When Han dropped cargo at the sight of the Star Destroyer, perhaps he left Boba Fett for dead and that’s why Boba hates him, there’s something personal and Boba has a vendetta story for Han. Of course the Imperial forces didn’t survive and that’s why Vader says “NO disintegrations”

Third season is about Boba post ROTJ. Opens with Boba Fett escaping and disintegrating the Sarlacc. Once he escapes and heals up, Boba goes back to work and looks for bounties. After the fall of the Empire, we would see Boba Fett hunting Imperial War Criminals and hunting the Rebel’s morally grey agents(Cassian executing a fellow Rebel would be an example of morally grey Rebels and Saw’s insurgents) just so the New Republic can erase the Alliance’s less desirable actions in history. Boba Fett catches the notice of a Mandalorian. Sabine Wren. The rest of the season would be to haveBoba Fett rediscovering his roots as a Mandalorian and for it to be a buddy cop story with Boba Fett and Sabine Wren. 

Before I continue, let me explain why Boba and Jango Fett can be Mandalorians and why it matters.In the comic Open Seasons it’s stated that Jango was adopted into the group the True Mandalorians. Their leader Jaster Mereel saved a child Jango from Tor Vizsla and Death Watch. The True Mandalorians were a group of Mandalorian supercommandos who rallied to the cause of Mand'alor Jaster Mereel. The True Mandalorians supported Mereel’s attempts to lead a reform of the Mandalorians’ more savage members, and followed the teachings of the Supercommando Codex that Mereel authored. The Codex outlined honorable behavior through a modernization of the ancient Canons of Honor and elaboration on the six Resol'nare, the basic tenets of the Mandalorian culture which the True Mandalorians heeded. Highly skilled and well organized soldiers, the True Mandalorians had been primarily assembled from the planet Mandalore’s full-time army, in addition to drawing numerous members from several of the Mandalorian homeworld’s most prominent clans. Despite being well organized, True Mandalorian rank and unit structure remained nebulous beyond their loyalty to the Mand'alor’s authority, as most Mandalorians of their era held little regard for official rank and preferred an informal command structure. Instead, the True Mandalorians divided their forces based upon the tactical necessity of a coming mission, choosing trusted and respected soldiers to serve as squad commanders for the duration of combat. The True Mandalorian army existed primarily as a fighting force to combat and destroy the threat of the Death Watch, for whom the organization’s members harbored a strong hatred. When not embroiled in conflict with their rogue Mandalorian foes, the True Mandalorians would sometimes offer their martial services to prospective parties as a mercenary company. Jaster Mereel saw an honest nobility in mercenary work, which had become a staple in the Mandalorian culture over the centuries. Among themselves, the True Mandalorians fostered a strong sense of camaraderie, respect, and care for each other’s well being, exemplifying the Mandalorian tradition of looking out for one’s comrades on and off the battlefield. While Death Watch led by Tor Vizsla favored barbarism and brigandage. Across the galaxy, the True Mandalorians battled the Death Watch in a series of conflicts that collectively came to be known as the Mandalorian Civil War. On Korda Six, Jaster Mereel was betrayed by his trusted ally Montross and was slain by Vizsla, but he was succeeded as Mand'alor by his surrogate son Jango Fett, who exiled Montross and continued to lead the True Mandalorians against Death Watch. The Battle of Galidraan, however, would prove to be the True Mandalorians’ undoing. Nearly eradicated by a Jedi strike force fooled by a Death Watch lie, Fett was the sole True Mandalorian to survive the events of Galidraan. The man who went on to wage a lone war on the Death Watch that saw the sect broken and Vizsla killed, before distancing himself from the Mandalorian people to become a famous bounty hunter. Though the True Mandalorians were destroyed at Galidraan, their code of honor and ethics survived, and served to inspire the core ideology of the later Mandalorian Protectors.        

Continuing as how it can be rewritten into canon.Let’s say Jaster sought out Jango’s father, but found the son. Jango’s father could’ve been a retired Mandalorian who sought a simple life as a farmer.Jango and his father were descended from the legendary Mandalorian Cassius Fett. But Jaster treated Jango like he was his own son.  There was a long and bloody civil war between The True Mandalorians and Death Watch. In the end Jango killed Tor Vizsla. Jango is the only survivor. Because of Vizsla’s actions that got the Jedi to slaughter the True Mandalorians, it became all too easy for what happens next. Once Satine Kryze became Dutchess,   she did not see the difference between Death Watch and The True Mandalorians. Because Jango became a bounty hunter, he was labeled as nothing but a “common bounty hunter” Jango’s Mandalorian heritage was erased and Tor’s son Pre Vizsla got his revenge without striking a blow. He was Satine’s ally for a time, so Pre must have gotten into Satine’s head to destroy all trace of Clan Fett as revenge. In the end, Death Watch won. The True Mandalorians are dead and Clan Fett was erased from Mandalorian history and culture as history is written by the victors.

Sabine helps Boba expose that Satine was not the perfect ruler everyone believes her to be. So the final season would be about restoring Clan Fett and to make Boba Mandalorian and give his father posthumous Mandalorian honor.