Been collecting, and addicted, for about a year now. Came across something I cant find an answer to... (failed at searching

Some marvel pops have different boxes where one has "Marvel" printed on the bottom while the other has "Warner Bros". This will be for the same exact pop. I noticed when I saw it on the bottom of my Phoenixs and did a quick ebay search showing both boxes for the same pop.
Misprint? Different production run?
Any help is appreciated!!
