Marvel is overshipping April 17's Spider-Man: City at War #2 and Magnificent Ms. Marvel #2 to retailers. Overshipping is where publishers send out extra copies of an issue at no cost to a retailer.
The publisher will be sending Diamond Comic Distributors-serviced retailers 50% more of the two issues than what they ordered by the March 25 Final Order Cut-Off deadline.
Last week, Marvel overshipped three March 27 titles - Daredevil #3, Invaders #3, and Marvel Comics Presents #3.
Marvel has not explained the reason for this surprise extra bit of comic books for retailers.