From Slashdot -

"It's being widely reported that Harrison Ford turned down a £20 million deal to play Han Solo once again in a George Lucas spin off of Star Wars. The source of this information seems to be a tabloid called bangshowbiz. Harrison was approached by Lucas with two roles but instead opted for the same amount to play Indiana Jones for the fourth time. Could the spin off centered on the rugged Han Solo save the Star Wars franchise from its prequels or would it have been another mediocre release disappointing demanding fans?"

It's an interesting idea, but it Lucas does spin off movies. Sorry movies 1-3 comes to mind and Jar Jar Binks. The TV Series I can understand and sounds better if Lucas doesn't put a heavy hand in it.