From Lagi - The Art of Panzer Dragoon (definitely the best PD site out there. I suggest you check it out if you haven't before):
Possible Title Meaning
in latin, Ortus can mean birth, origin, rising / origin, source
This could mean either the birth of the series (like a prequel) or perhaps a rebirth of the series, (like the dragoon breaking out of the rock in the orginal teaser). Since it looks like the dragoon rider is female, maybe you are a young Azel....
thank you Florian Patzke for the latin tip.

Just thought that was pretty interesting...