User blog comment:CheeseBurgerGuy/Where Did It Go Wrong?: How Does Heather Make the Finale in Island, Action, and All-Stars?/@comment-24784093-20190910085135/@comment-35606925-20190910193039

I would sub Lightning for Gwen anyway for villain finales but all of those look like the could've been intresting...except Blainley because that's just flat out unearned.

Even better is the main protagonist vs the main antagonist:

Gwen vs Heather (Island)

Lindsay vs Courtney (Action)

Alejandro vs Sierra (WT)

Zoey vs Scott (Revenge)

Mal vs Duncan (All-Stars)

I say Duncan since, in this timeline, all other mergers of All Stars were in the finale already other than Cameron. Duncan makes more sense than Cameron in my eyes.