He's BEAUTIFUL! Another member of the two-dog club! Awww...it looks like him and Buddy get along great already.
I have to admit, I personally don't see any great dane in him at all. I'm sure I see Aussie, but that's about all I can identify, LoL! Maybe some GSD and lab, too, given how stocky he is.
Wow, 55 lbs....Banzai's probably going to be about lab to GSD size when he grows up. Such a big boy!