User blog comment:TheUnknown285/Bioware releases teaser trailer of Mass Effect 4/@comment-11209678-20140610002601/@comment-24200891-20140611211212

Fighting wild fauna is a part of combat. If in ME:Next we have more mercenary jobs, then we fight guards of station we ambush or infiltrate. Also there can be peacekeeper/peacemaker situations, for example quarians after reclaiming their homeworld could try to also retake their old colonies like Arvuna, where is Firebase Hydra. Humans living there won't resign from their homes so easily. Another possible, but boring situations in ME:Next can be crimelords trying to take over damaged systems to exploit them like Darius or great trio of Merc groups on side missions in ME2.