As the title implies, The Empire is part of the Legends continuity, which is confirmed as non-canon.
According to Wookieepedia, this is a collection of old EU comics:
Although technically this is a new release, it's a re-packaging of old material; the canonicity of each work is unchanged.
A statement by Marvel Comics SVP David Gabriel confirms that the Epic Collection is going to be a collection of old comics from the history of the Expanded Universe, which means this title is firmly Legends (emphasis mine):
"We're thrilled to be bringing our innovative Epic Collections to a galaxy far, far away. We'll be bouncing around to different periods of Star Wars history with each Epic Collection, constructing one huge tapestry, collecting full unbroken runs of all the greatest Star Wars comics from the past 35 years."
It's always possible that details from these comic stories will be incorporated into canon at some future date; in the answer I link to above, Richard quotes LucasFilm Senior Editor Jennifer Heddle, who says in response to a question:
Mike (@Hooperswan): does this mean everything post Return of the Jedi is no longer cannon [sic], but everything before is canon or is it all non-canon now?
Jennifer Heddle (@jenheddle): It's all non-canon, but it all exists as a resource that could be used down the line.
But if that happens, these comic stories will still be non-canon unless LucasFilm explicitly says otherwise.