So, apparently there will be a lot more to do online with people. This is a quote taken from serebii.net:
"Two new features of Black 2 & White 2 have been revealed by a promotional pamphlet posted on a Japanese Blog. First is the Fes Mission, which has you partake in missions with friends, in a similar manner to the EntraLink Missions in Black & White and get prizes based upon your score. This is done via the wireless features. Second is Join Avenue, which is part of a shopping centre which you can build with various friends via connecting with them. It's currently unknown to what extent but there is an image of putting a stand in the shop. Other players will be able to visit your shop while you can visit theirs. In addition to this, a 2000 yen Point Card for the 3DS is being released with a Pokémon design. This card will cover the costs of the 3DS download software Pokémon Dream Radar and Pokédex 3D Pro. "