Unfortunately, PokeTransfer & PokeBank is unable to migrate Pokemon to Gen VII currently; it is said that migration to Gen VII will be available in January 2017.
No news has been announced on new compatibility updates, therefore it can only be inferred that Gen VII will be like its predecessors; Sun and Moon will probably only trade between each other and Pokemon are likely unable to be transferred to previous generations. And as per the current PokeTransfer restrictions, unfortunately, Pokemon with items are probably disallowed from migration.
Hope I helped. :)
Source and inference