From the press release:

Just how bad is the X-Men’s vampire problem?

THAT BAD.

Marvel urges retailers to check their orders on X-Men, as the first issue sold immediately and will return with X-Men #1 Second Printing Variant. Check the Marvel Mailer for more information.

X-MEN #2 (JUN100623)
Written by VICTOR GISCHLER
Penciled by PACO MEDINA
Cover by ADI GRANOV
Rated T+ …$3.99
FOC—7/22/10, On-Sale—8/11//10

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2. Your First Look At Marvel’s X-Men #1!
3. A Second X-Men #1 Teaser: Evil Seduces
4. An All-New Look at X-Men #1!
5. Marvel Announces X-MEN DAY!