The following info comes from a data miner on Reddit who was sifting through the game's source code...
- mention of trading
- mention of searching, offering, responding and results of a trade
- references to “Item_incense_spicy”, “Item_incense_cool” and “Item_incense_floral”
- reference to “activity_catch_legend_pokemon”, suggesting Legendary Pokemon are on the way
- hint that McDonalds sponsored events or locations may be heading outside of Japan