EGM (Electronic Gaming Monthly) went defunct in Jan 2009, came back in April 2010. Sadly, my outstanding subscriptions (somehow I had wound up with two) didn’t get revived along with it.
As far as I know, the revived version is still going, but I don’t really go magazine shopping/browsing much anymore.
And if you want to extend it from just magazines to periodicals in general, you could fill a tome with the number of comic books that have gone defunct and later revived.