This is Rumor Control. Here are the facts.
Are you, or someone you love, possessed of the notion that Alden Ehrenreich's Han Solo might appear in Rogue One: A Star Wars Story?
Gareth Edwards would like a word.
But, wait! There's more! Maybe you've been thinking that Hayden Christensen has a chance of appearing in Rogue One.
Here's Kathleen Kennedy with an answer:
So, there you go. Straight from the mouths of Rogue One director Gareth Edwards and LucasFilm President Kathleen Kennedy.
This has been Rumor Control. End transmission.