I saw one sign on a McD's that said;

"McWrap sold here"

I have a few other suggestions including;

"Try our delicious McWrap!"
"On a diet? Eat our McWrap!"
"You could be full of McWrap!"
and finally...
"Buy one Mcwrap, get two McWraps!"

word games are fun, and this is a definite advertising fail.
FYI when I first heard this (not read it with the W) my first thought was not "Oh McDonalds is making a wrap", it was "Yeah McDonalds does have a lot of crap on their menu"