DC Batman and Marvel Ultimates page! Two published pages in one by Travel Foreman

I have seen a lot in comic art collecting, but I have never seen published two sided art for different publishers!

I bought this page as a Travel Foreman The Next Batman: Second Son issue 5 page but there was very detailed sketches in the back. The top portion was likely. not published (Mickey Mouse with Wolverine claws!) but the bottom was way too detailed for just warm up sketches. I asked Travel and he said they were Ultimates pages, he was low on paper and just used the other side!