2 things here. I was on the quest to find Shito (or something, the playwright who's "in the caves to the East") when I decided to jump into the Wilderness for that little extra explorer percentage. First thing I noticed is that the artwork on the mini map for the portal is off by a little. You can actually walk through the mini-maps 'portal' and still be in the Resplendent side.
Anyway, the more important bit. When coming through from the Resplendent side to the Wilderness side, firstly, there are some enemies that spawn just to the right of you that seem to disappear for no reason.
Secondly, the Elder Skree's that are in a line (just past the Whispers informant on the right) don't actually attack you, they just move around a bit and even run past you to the Resplendent portal, then stop there and do nothing in particular. Seriously, I killed about 5 of these level 20-odd monsters with my staff alone (thought it would be funny).
I'm an E/Mo R3 Lightbringer who has completed NF if that makes any difference.
Upon further inspection, if you bear a right out of the resplendent - wilderness portal, you can go all of the way up to the Djinns without getting attacked. Also, the beasts around there (I'm really sorry, I can't remember their name and can't get back on now to check, they look like lizards) seem to move in a horizontal line left to right. Kinda military-ish in its execution, like they are marching.
Can somebody else confirm this please as I'm 99.999% sure that this wasn't lag or anything else client-side
EDIT: Now with pics!!!
Me and the Skrees having a portal picnic
Definitive proof that even the most hated of foes can come together at Wintersday.
BTW, these guys just sit there while you attack them and are level 28....Uber leet EXP!!!!