I'm a big Dragonlance fan and i'm still kind of active in the community. If you're talking about this
Dragonlance book, these books aren't reprinting the DC issues.
Those three books are collecting a new version by Devil's Due publishing. As far as i know they are not collecting the DC issues from the 90s. I haven't read them. If i could find them for cheap i would get them. They're also collecting the Legends trilogy as well.
I did a little research and IDW is also reprinting the DC comics under Dragonlance Classics. The last volume of that also released this month.