Unlike many translated works, this was an by UDON with no Japanese counterpart. Marvel Vs. Capcom: Official Complete Works - Amazon.com
Let’s be direct. Downloading a copyright-protected art book from a file-sharing site is technically piracy. However, the Marvel vs. Capcom franchise has a tortured legal history regarding licensing. Because Marvel sold the film rights to various studios (Fox for X-Men, Sony for Spider-Man) while Capcom held the game rights, reprinting this book was a logistical nightmare.