In my view, speculation needs to have at least something in the text to go off of. We have exactly zero text that could be interpreted that the Starks have a blood relationship with the Arryns.
So in my view its a dead end. If you can come up with text which can plausibly be interpreted as a clue that there is a blood relationship there I'll discuss it.
Not to mention that While I could see the Tyrells going for a Willas match, Cersei would rather see the Kingdom burn that wed Sansa to Tommen. No matter what LF tried to convince her she could get out of it. Cersei has convinced herself that Sansa was partly responsible for Joffrey's murder and has placed her firmly as the wicked betrayer to her benevolent foster mother.
Cersi is the sort to believe her own lies too, Unlike the Stark girls who use method acting to protect the lies which protect their selves, Cersei lies to herself and believes her lies to be true. In her mind Sansa is a murderer.
And yea No text to even hint the Arryn may have stark blood in them or the Starks Arryn blood. At least non recently enough to make a claim.
I disagree that we have nothing.
We have a man who shows clear sociopathic tendencies. He claimed for years to love Catelyn Tully and then also pretended to love Lysa as a backup plan, and yet who shows no sign at any point of feeling any love for anyone, and towards Catelyn and Lysa his behavior is the opposite of loving.
So it is perfectly legit to consider other reasons he wanted Catelyn, then when that failed, Lysa.
You could argue it is just that he wanted the Riverlands, however he is from a minor house of the Vale, not the Riverlands, and seems to know, in extraordinary detail, the line of inherritance of the Arryns. A line from which people have been conveniently disappearing, one after one, for a very long time during LF's lifetime.
Edited by Hippocras, 05 April 2014 - 04:31 AM.