To commemorate the coming of 2014, some books such as Avengers will be getting a renumbering by the name of Avengers #24. NOW and some new books will be launching, such as All-New Invaders by James Robinson and Steve Pugh, and Inhuman, by Matt Fraction and Joe Madureira.
Presumably more books are expected to be announced in the coming months, with different creative teams and whatnot.
Also, issues will come with a digital code that allows for free digital versions of the comic using the Marvel app on a computer or a phone.
Below is a picture of All-New Avengers