Turns out twas just a contractual obligation over the director. Fox had him under contract and Sony wanted him back for Spidey 2 so they came to an agreement over promoting DOFP. Perhaps in 2089 we'll see Wolverine and Spidey fist bump
It's May 2 in US. I was just looking yesterday to see when I can see it. I think overseas opened like April 20th or around. They already have it up at Forbes with 47 mil. And here's the article.