DominicCobb said:

Some details: release date is May 25, 2018. Han will be late teens/early 20s. Was originally going to be the third anthology film but the second (most likely Boba Fett) got pushed back because Josh Trank is an asshole.

source: http://www.ew.com/article/2015/08/13/star-wars-anthology-young-han-solo/

I think the postponed movie is about Kenobi, specially because of this statement by Kennedy

“It’s still one of the stories that we absolutely want to tell,” she says. “There is a lot of innovative technology in and around what it is we’re doing with that story, so for a lot of reasons, we were comfortable postponing that. But we’re definitely still developing it.”

Probably the "technology" in development is related to matching Ewan and Guiness