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While Capcom occasionally release new costumes for Ultra Street Fighter IV
, PC gamers have been modding the various PC releases of Street Fighter IV for years, toying around with the character models to give them new looks. Costumes run the gamut from a Kratos outfit for Sagat to Sakura with long hair and a bandana. Deviantart user Khaledantar666 is one such modder, and has been releasing a variety of costumes for both Ultra Street Fighter IV and Street Fighter X Tekken. You can find some of his work below with the appropriate links back to his Deviantart page. 
A Bayonetta mod for Poison in Ultra Street Fighter IV.
An Iron Man Hulk Buster suit for Zangief in Ultra Street Fighter IV.
A Spider-Man costume for Fei Long in Ultra Street Fighter IV.
A Link mod for Cody in Ultra Street Fighter IV.
Other costumes Khaledantar666 has created include Batman and Batman Beyond costumes for Lars, a Vanessa look (from PN03) for Alisa, and an Alucard look (from Castlevania: Lords of Shadow 2) for Lars in Street Fighter X Tekken. You can find them all on his DA page.
