... and they're pressing hard against the cit, probing for a weakness.

Much may hinge on what the motivation is for these numerous factions of aliens to be invading Earth. Resources? Living space? Religious significance?

If these aliens did not originate in our solar system, where did they come from, and how did they get here?

With technology so much more advanced than what humanity possesses, of what interest is Earth, either to the invading factions or to the Traveler?

Will the Traveler turn out to have been made by a long lost advanced alien race that, in the final reveal, turn out to have been humans all along?

I sort of hope not.