And yeah, Caius being able to transform into Bahamut is just a random asspull from Toriyama/Watanabe made for XIII-2. It was never foreshadowed in XIII.
Wrong!!!!!! Sir you are wrong!!! Fang and Vanille merged with their ediolons. Wooo! I feel good. http://www.youtube.com/watch?v=DuDeBcpLITQ
They never did a summoning ritual like Caius; this is a totally different thing. Ragnarok is not an Eidolon. And Fang and Vanille turning into Ragnarok was not properly foreshadowed in the first place, either.
Sigh... * rolls up sleeve* -This is a picture of Ragnarok: http://images1.wikia.nocookie.net/__cb20111001171515/finalfantasy/images/b/bf/Ragnarok.PNG You can clearly see that it is a cross between both Vanille's and Fang's Ediolons. Different from Caius yes, but same concept: merging with your Ediolons. And uh... If we knew that they were to become Ragnarok, the ending would be left surprising... and it was kinda obvious because Fang and Vanille were the only humans left after the War of Transgression when the shell was cracked...
-And no can do what Caius do "Wings of Night" -.- Yea that's the simple ritual.
We have to consider that the plotline in a sequel would not completely follow the original unless they planned it when they released the original.
Ragnarok is not an eidolon. Period. And there is no "summoning ritual" in XIII.
What? My problem is that Ragnarok was stated to be a beast of destruction, and it was controlled and used for good at the end, and you can apparently combine two l'Cie's to form a stronger Ragnarok, which was not foreshadowed.
What? You make less and less sense. What are you trying to say here? Caius uses a summoning ritual in order to form a pact with Bahamut, which was not foreshadowed in XIII. Even if Ragnarok was an eidolon (he isn't), this would still be a totally different thing, as Fang and Vanille's transformation to Ragnarok was a temporary thing that can only be used at specific moments, whereas Caius can transform into Bahamut at any time. Totally different things.
They should use less asspulls when thinking of a direct sequel, then. It's something called, y'know, quality writing.
"Dyin' is easy. It's the livin' that's hard..." Grim Reaper, Maximo vs. The Army of Zin