You get to see Shelton Benjamin, that should be enough for you.
Last time I saw him he put on a shit match. I'm excited to see Jericho (never seen him before), Punk, Edge, Mysterio, Morrison and whoever else moves there in the draft (hopefully Orton and Swagger).
I think Wrestlemania should have events in other continents
Wouldn't work. Because of the timezone differences, if you put the show on a Sunday night here, then spoilers are going to come out on the internet before it airs on a Sunday night in America, and less people are likely to buy the Pay-Per-View. If, however, you wait for it to be Sunday night there, then the Pay-Per-View is going to begin at 10am on Monday morning here, and people aren't going to want to get up then, especially when they have work/school.
In other continents the timezone difference may not be so extreme, but the same principle still applies.