Marvel has announced that it is publishing a Mighty Marvel Must Have collecting Astonishing X-Men 1-3, with an August 25 street date.  MSRP will be $5.99.  The August 25 street date is the same as the street date for Astonishing X-Men #4.

 

All three issues have sold out from the publisher, some in big numbers.  Astonishing X-Men #1, for example, sold over 209,000 copies in May (see 'Three Comics Top 175k').