Maybe you'll have to visit various planets in the sequel, and the particular planet in the trailer has humans as dominant population?
Hillys could be the 'home turf' then, where you return after each planet mission and buy starkos & k-bups, upgrades, etc. Heck, I definitely want to see those rhinos and the orphaned kids again.
Considering Pey'j's 'affliction', I think +n years later is impossible - the affliction seemed rather urgent on Double H.
Hopefully we'll get at least a token of information on the plot in the near future..