| > > > > does this mean katar the alien hawkman never came to the new earth?|
> Near as I can tell, Hawkworld's still in continuity. That said, there's not worlds of evidence either way since Infinite Crisis.
In "Rann-Thanagar Holy War #1" Carter is able to pass for a Thanagarian (and still had dark hair) so presumably he's still merged with Katar.
> Any human can pass as Thanagarian.
To humans. Apparently, Thanagarians have highly defined enough senses that they can smell the difference, as Shayera stated in Johns' Hawkman run. (Carter, however, smells like Katar in those issues.)