Well, from what I've been able to see, all of the Egyptian units so far look like this:
http://wiki.totalwar.com/w/Total_War...yptian_Faction (scroll down to see the Egyptian Phalanx picture)...which is fine for a minority - the Machimoi levies, but these should be a minority of troops. In the Battle of the Nile, all of the soldiers that I could see were dark skinned, wearing 'Egyptian hats', etc.
I could be mistaken of course, and I hope I am.
Edit:
http://www.youtube.com/watch?v=Kg42DC4EpMY For example, look at the skirmishers at 1:30, the 'Egyptian Infantry' at 8:24, and 9:46, 11:48 the 'Camel Archers' near the start of the video, the 'Camel Spearmen' at 9:25, 'Egyptian Archers' at 11:02, the crews of the ships appear Native Egyptian at 12:19-ish
At 12:10 we get a shot of the 'Ptolemaic Cavalry', which is the General's bodyguard for this battle. We don't get very close...it -might- be Companion cavalry inspired, but I just can't tell. The point is, every single unit in this battle looks 'Native Egyptian' to the extreme, with the faintly possible exception of the general's guards. I've looked very hard to see evidence of Ptolemy and not Ramses...haven't found it yet. Don't think it's there.