Let us assume that it wasn't satellites that are found but small space stations throughout the galaxy, as the smaller satellites can hold a "black box" or safe box that may be able to withstand the heat, pressure and impact associated with re-entry and can be a fun hidden treasure type mini-game I would rather explore a more direct and re-playable scenario. With the small space stations we can explore the inside which may or may not be taken over as bases by enemies or can be a newly discovered wreck on a planets surface or even be still in space (drifting space frigate type) and can be taken over by players who clear it out and can be replayed with different enemy factions taking over the same ruins. They can also play a part in a weekly, or monthly, defend-type scenario where a group of players need to stave off waves of enemies who are attacking and depending on the size, many fire squads or fire teams may be able to fend off different parts of the station and for those who fail, others may be able to clear those areas which were taken over still allowing for more play. I like the team play aspect of small space station gameplay rather than hide and seek but the two could be combined where to find these space stations you must find the hidden satellite safe boxes strewn about the landscape and to find them you must search the many facets of the planets rock faces or heat-blasted glassy sand craters.

well...not very spectacular possible, but lackluster

Well there'll definitely be space junk but I wouldn't get my hopes up for this type of stuff Bungie has so much to work on with the gameplay and all They can't model the entire world with complete scientific accuracy