I've been wondering about that too. That would be truly awesome, but I don't know if that's gonna happen. It's not too late to write letters to PUSA asking (or begging, if you're a begging sort of person) for them to play the Japanese openings/endings in the show. But I'm not so sure they'd do that, what with all the Americanization that's being dumped on dubbed anime like sweet and sour sauce on chicken.
But 'cha know, people, they're not gonna start with Spurt! and Watashi, Makenai! if they do play the original Japanese themes. They're going to start with the ones that match the episodes. We'd be getting Battle Frontier and Pokemon Kazoe Uta (a.k.a. "the poor man's Pokemon Ondo"). Happily for me 'cause I love Battle Frontier. I know, I know, I stated the obvious...
Umm...The openings with original footage and tune, but with English lyrics?! That would be wrong on SO many levels. First off they wouldn't match the tune very well. Remember Type: Wild and how insanely fast Rika Matsumoto sings in the beginning? Well, I've heard it dubbed into English and and the fast singing is gone because there are way to few syllables in the translation. It shmucks. Just thinking about Spurt! in English scares me.
Of course, if we're really, really we'll get someone like Utada Hikaru. But, like DPT, I've got a feeling that we're just gonna get weird raps like in The Mastermind of Mirage Pokemon.
*sniff* But no matter what, the dub will never ever see Soko ni Sora ga Arukara...