Oh I've thought about that
Certainly wouldn't want it on the same orbital plane unless you could ensure it never got close enough to significantly alter our own orbit.
It's very likely that a heavy atmosphere isn't sustainable there because of the lower gravity but trying to revive it so far away from us is way too hard and requires resources I can't imagine us ever coming up with.
Maybe, if we can hit it with large enough chunks to actually alter its orbit we'll also increase its mass enough to cause higher gravity.
It's definitely in the science fiction realm. Maybe I should start the novel.
Art