I feel like this fight would last longer than a few seconds. Obi-wan isn't a total noob. We've seen duels in which one of the opponents is completely superior to the other in every aspect, yet still manages to put up a fight, even if it may be short. I'd say he would probably last a minute before he gets totally destroyed.
Some of the posts in this thread are depressing. There are no words to describe how badly Sidious would destroy Obi-wan and he could do it under 1 second.
Their blind lives meant nothing now. None of them. Because ahead, on
the vast cliff face of the Senate Office Building, one window spat lightning
into the rain to echo the lightning of the storm outside-but this lightning
was the color of clashing lightsabers.
Green fans, sheets of purple-
And crimson flame.
He was too late.
The green fire faded and winked out; now the lightning was only purple
and red.
---
NGL, I was impressed by Fisto's performance against Palpatine.
__________________ "There is only Revan. Only he can shape this galaxy as it is meant to be shaped."
There are several depictions of Kit's performance against Palpatine. In Yoda's vision and in the comic version, he was killed with a single strike. In the movie he deflected a couple of blows. The novel's retelling is the outlier here, tbh.
"[Dooku] gathered the Force once more in a single indrawn breath that summoned power from throughout the universe; the slightest whipcrack of that power, negligent as a flick of his wrist, sent Kenobi flying backward to crash hard against the wall."
If Dooku can do that so easily, I shudder to think how Obi will fare against someone a clear tier above the good Count.
Not selling Dooku short - he's damn near the best in the PT, but "near" just isn't good enough, for either him or Obi-Wan.
__________________ Earth is a beautiful addition to the Galaxy...but an even finer accessory on the hand of a God.