I reckon you can just visit them in the go park and maybe at a push bring them onto your walker to boost BP - I would be very surprised if you will be able to bring them into your 'adventure' team. Bet there will be a pokemon go battle tower or something for them instead - unless it has its own GTS type thing and not compatible with pokemon box then it won't matter at all!tfw Dual Ball is a canon thing on a Pokémon game now...
Seems interesting, definitely looking into GO's success, and trying to work from there. Hopefully it means more influence from GameFreak into the app's future!
One wonder though, how the hell are GO pokémon gonna work when transferred? I assume there's gonna be some way of avoiding getting 27 Charizard/Legendaries? Hmm...
Ps I love the nod to dual ball - should be more links to the TCG lore in the games!