User blog comment:Ultimatephinferbfan/Alt. Doofenshmirtz Might not be the main villian./@comment-3212462-20110406223715

That may be the case. I originally thought that the alternate Phineas and Ferb would be labeled as antagonists. However from the few screenshots that we've seen, they really dont seem to be evil. Don't take my word for it, though.