Marvel has been in a bit of a slump lately, with lagging sales, poor PR, and a lackluster reception to their Marvel Legacy initiative. But all of that is about to change in a big way, because Marvel has figured out the way forward, the solution to all their problems, and a way to revitalize their product line and reinvigorate interest in Marvel Comics: more variant covers.

In January, 21 Marvel comics will be graced with Avengers-themed variants to coincide with the start of Marvel's Avengers super-mega-not-a-crossover event, No Surrender. We first heard about these plans back in October, with some of the covers revealed at that time. Today, Marvel has released 15 more variants that will surely convince your local comic book retailer to order more copies of these titles than they actually need, thus restoring health and balance to the industry.

Check out the variants below:

Here's the 21 titles that will be getting Avengers variants in January:

1. AMAZING SPIDER-MAN #794 by TODD NAUCK

2. ASTONISHING X-Men #7 by MARCO CHECCHETTO

3. AVENGERS #675 by MIKE MCKONE

4. AVENGERS #676 by ALAN DAVIS

5. AVEGERS #677 by ESAD RIBIC

6. AVENGERS #678 by MIKE DEL MUNDO

7. BLACK PANTHER #169 by MARCOS MARTIN

8. CAPTAIN AMERICA #697 by JOHN CASSADY

9. DAREDEVIL #597 by LEINIL FRANCIS YU

10. DOCTOR STRANGE #384 by KAMOME SHIRAHAMA

11. GUARDIANS OF THE GALAXY #150 by MAHMUD ASRAR

12. INCREDIBLE HULK #712 by ADI GRANOV

13. INVINCIBLE IRON MAN #596 by CHRIS STEVENS

14. MARVEL TWO-IN-ONE #2 by GABRIELLE DELL'OTTO

15. MIGHTY THOR #703 by ROB LIEFELD

16. OLD MAN HAWKEYE #1 by BARRY KITSON

17. RISE OF THE BLACK PANTHER #1 by TYLER KIRKHAM

18. ROGUE & GAMBIT #1 by DANIEL ACUNA

19. SHE-HULK #161 by MIKE PERKINS

20. TALES OF SUSPENSE #101 by CARLOS PACHECO

21. VENOM #160 by INHYUK LEE