Los Angeles, California - The first trailer for the new Disney+ series Obi-Wan Kenobi has sent waves of excitement across the Star Wars fan scene, with some even speculating about a possible surprise cameo of one of the saga's most beloved characters.

The miniseries, which begins streaming on Disney+ on May 25, sees Ewan McGregor return to the role of Jedi master Obi-Wan Kenobi for the first time in 17 years.

The story takes place between the events of the 2005 prequel Star Wars: Episode III - Revenge of the Sith and the first 1977 feature film Star Wars: Episode IV - A New Hope.

Now that his friend and former student Anakin Skywalker has turned to the Dark Side and become the Sith Lord Darth Vader, Obi-Wan lives in seclusion, secretly watching over Anakin's twins Luke and Leia.

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Empire forces are now trying to track down remaining Jedi warriors and, above all, Obi-Wan – beyond that, the trailer reveals little more about the plot.

But that hasn't stopped eagle-eyed fans from speculating about the return of Star Wars hero and "stuck-up, half-witted, scruffy-looking nerf herder" Han Solo.

In one trailer scene, we briefly see what appears to be the blaster of Han Solo, the character played by Harrison Ford in five Star Wars films and by Alden Ehrenreich in one.

Although the younger Ehrenreich could reprise his role, Disney+ previously made heavy use of visual effects to allow Mark Hamill to perform a younger version of Luke Skywalker.

This has sparked speculation and discussions on fan forums that Harrison Ford could return for a Han Solo cameo.

In addition to McGregor, Hayden Christensen returns as Darth Vader and Joel Edgerton as Luke's Uncle Owen.

Obi-Wan Kenobi will be the third live-action series from the Star Wars universe after The Mandalorian and The Book of Boba Fett.