User blog comment:NBerkhof/Return to the Second Dimension!/@comment-4691466-20121203035415

I noticed a few things in the picture. Phineas-2 and Ferb-2 are dressing like Phineas-1 and Ferb-1, although they still have military haircuts and Ferb-2 has the sunglasses.

Doof-2 is in jail.

Candace-2 is dressing like Candace-1, although she still has the sunglasses and bandana.

There is a woman on the far left, next to the older man's head. Judging by her attire and greenish skin color, that is probably the villan.