User blog comment:ImperiexSeed/We get it, Flash writers, Wally's gonna become the god of the speed-force/@comment-3481504-20161214181801/@comment-3481504-20161222062358

In the future, Barry stops Plunder, but that's changed in episode ten when WALLY stops him. So, same could easily apply here, where while it's Barry who stops Savitar in the future, it could turn out to be WALLY instead.