I don't think it's that they bombed, per se. It's that each successive release is achieving fewer and fewer sales in relation to the previous ones.
Sven might argue that it's because interest in these sorts of releases are declining, others might say it could be related to the fact that the later titles are simply a step backwards (releasing Marvel Origins after Marvel 2 just confuses me) or just niche (JJBA (though cost was also a factor here), and I don't believe the Darkstalkers following is anywhere near what Ono would like to believe).
Sven might argue that it's because interest in these sorts of releases are declining, others might say it could be related to the fact that the later titles are simply a step backwards (releasing Marvel Origins after Marvel 2 just confuses me) or just niche (JJBA (though cost was also a factor here), and I don't believe the Darkstalkers following is anywhere near what Ono would like to believe).