If this is a direct sequel as the names seem to imply so far, I think it would pretty sweet if you could do something like take your pokemon black/white game ID from online and then be able to start b/w 2 in a new game + sorta way. Where you have all the old pokemon from your b/w game and you go through with the trainers being stronger and with tougher teams, mabey you even get to encounter non gen 5 guys earlier in ng+. Not a very likley idea but still fun to dream.
I'm no expert on the DS carts but I'd think that if these games are gonna be on nintendo DS then one of the biggest obstcals to including ALL of hoenn in b/w 2 would be being able to fit it all on one cart. Issun itself is a big place and hoenn is also pretty big you know. New smaller areas are very likely but IDK about all of hoenn. Who knows though, I don't have much of a clue how much DS cart technolgy has advanced since the diamond and pearl days.
I'm no expert on the DS carts but I'd think that if these games are gonna be on nintendo DS then one of the biggest obstcals to including ALL of hoenn in b/w 2 would be being able to fit it all on one cart. Issun itself is a big place and hoenn is also pretty big you know. New smaller areas are very likely but IDK about all of hoenn. Who knows though, I don't have much of a clue how much DS cart technolgy has advanced since the diamond and pearl days.