Emma, Lo, and Fin do not sound like they're voiced by Bridgette's VA, but there is a female character I saw in the first promo (with the possible theme song) that wasn't in the one with the speaking characters, so she very well might be voiced by Kristin Fairlie.
It sounds like Caitlin (from 6teen)'s VA plays Lo.
In fact, here's the VAs I can gather from the video.
Reef: Geoff from TDI's VA
Fin: Heather from TDI's VA
Broseph: Sounds kind of like Wyatt from 6teen's, but hard to say.
Emma: Hard to say. Sounds kind of like Lindsay or Beth's voice actress from TDI, but also sounds kind of like Izzy's.
Ripper: Jonesy from 6teen's VA.
Lo: Caitlin from 6teen's.
The black guy (or African-American. Whatever you prefer.) without the afro from the possible theme song and a blonde girl with longer hair weren't in the newest one.. Maybe they're secondary characters.
Is it just me, or is Fin's character design just Nikki from 6teen's with different clothing and skin and hair color? :/
I believe I said this before, but this is feeling like a "teenage" version of Rocket Power. And that isn't a bad thing.