No reason we cannot have an Athosian (see my earlier post) then!
You know, one detail I really liked in both VOY as well as DS9 was the presence of multiple members of the same species hanging around. Tuvok and Vorik for example, or Quark's entire family!
Be nice if the new crew of the Enterprise E
included (for example) several Andorians, some of whom we'd only see in the background now and then.
And it would be cool as well to introduce a new alien specie who are just there, in the background. Maybe have the regulars interact with them now and then, whereupon we learn a few odd details--like the curvy ones with breasts are the males, and they like to drink salt water, etc.