For sure I'm using some new Pokemon on the team, at least for the story play through. I feel like I'd be foolish not to, the new Pokemon are cool and I really like them. Once the main story is finished I'll bring my 3DS team over, or at least as many of them as possible, and do the post-game events with them. Having 8 badges by then will ensure I can control them after all, what with them being Lv. 100. For sure I'm gonna actively attempt to catch and try out everything in the region, though.
"No matter where our destiny leads,
I'll be there for you,
Always come through,
And that you can believe."