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Street Fighter IV: Aftermath is a series of animated prequels that were released as trailers to Street Fighter IV. Street Fighter IV: Aftermath treats Street Fighter II as a near-canon discontinuity and retcons many of its events, such as Akuma's assassination on M. Bison.
In her Aftermath episode, Viper is seen exploring the Temple Hideout that M. Bison once used as the final setting of his World Warrior Tournament but would fall into disrepair after the fall of Shadaloo. After reaching a nearly-abandoned village near the temple, she meets and interviews a man who is the sole inhabitant of the village, with the other inhabitants leaving after the fall of Shadaloo. The man reveals that while Shadaloo did subjugate the village and used it as a base of operations, they've also supplied the village with needs. The scene then shifts to a flashback where Bison's cause of death has been revealed. It was revealed that Ryu, Ken, Chun-Li, Guile and Cammy managed to reach Bison in the tournament and managed to defeat him in a fight that ensued in the wilderness.
After being urged by Guile to surrender, M. Bison refuses and attempts to kill all of them by unleashing all of his Psycho Power to kill all of them but fails as it only manages to blow them back. In the ensuing aftermath, M. Bison's body would be recovered the Shadaloo scientists so that he can be revived and the government would tirelessly investigate the Shadaloo base, which has been blown up following the death of Bison. Despite lacking any evidence that proves that the other members of Shadaloo have died, the government would presume that the other members have also died. However, Balrog, Vega, and Sagat were revealed to still be alive and well. After being partially resurrected, Bison would send some agents in an attempt to re-recruit the former members.
Despite succeeding in recruiting Balrog and Vega, Bison would fail to recruit Sagat, who tries to assault the agent Bison sent. The scene would then shift to Bison, whose body was incomplete but adequate enough to stand up and fight. Seth and Abel would then be revealed before Crimson Viper muses about the flowers and its luck in growing without intervention.