halo 5 trailer question?

Games Halo 5: Guardians
1

in the trailer at 1:57 under halo logo on the ground, what is the symbol?

link: http://www.youtube.com/watch?annotation_id=annotation_734571&feature=iv&src_vid=1qSTpClAybI&v=blW40AVWXrE

2

Its the shadow effect for the text my friend the ring shaped O makes the halo ring logo appear on the ground due to the shadow effect

3

its actually a 5. if u look closely the H and A don’t make a shadow.