Bad Name won't work on MOST european countries because it won't be dark. However, gigs don't start before 10,11 pm in Portugal and Spain, unlike what happens in the UK and northern european countries so I wouldn't be surprised if bad name was the opener when it's already dark.
if all else fails, they can always open with Raise your hands or LH - god forbid lol.

I still think Blood on Blood was their best opener ever and it served 'em right for most of the Circle/GH concerts.
My dream opener ? Prayer, without a doubt. I got into Bon Jovi in 1995 so you get the idea.