I've just come across this thread, I can't believe I haven't seen it before.
Ignoring the tit for tat school room tantrums I've learned are part of this pinball forum (there seems to be nothing people like better than to stoke fuel on a fire), I am really excited to see the chance of another Pin being made.
Thunderbirds was huge in most places in the World, but never really popular in the U.S. But, as has been said by others, even if you don't get the theme, it doesn't preclude the fact that it could be a first class pin. I really hope it is.
I must admit, I was a fan of the show when I was growing up, and without it, all the special effects for movies like the original Bond series etc wouldn't have existed as they came up with the miniaturisation of things for explosions and the like.
I'm really looking forward to this, and hope that this post can end up as ongoing update on how the pin progresses rather than (as I saw the WOZ forum go) a continuing he said I said, my dads bigger than your dad and I'll get you in the playground at lunchtime insult match.