I love how I just said above you how stupid the Shakespeare comparisons are and you posted this, lol. Also, fighting over a crystal is nothing like Romeo and Juliet... in the slightest...
I'm not saying at all that the game's story is going to be influenced by Hamlet (I don't think it's going to be, at least not in a significant way), but I wouldn't be surprised if it was.
I mean, Shakespeare tragedies are usually defined by common elements, those being treason, usurpation, vengeance, love... and this game seems to have vengeance against Nifleheim for stealing the crystal and invading Lucis (and maybe killing Regis?), and it's possible that it also has elements of love (nothing new in the series), treason and usurpation (Regis said in the 2011 trailer something like "this throne won't be yours", so who knows if the throne is usurped by... I don't know, the guy who looks like him?He could work as a Claudius xD. Idola?)
So I don't think it's stupid at all thinking that it MIGHT have Shakespeare influences, assuming that it's going to have them is totally different. But yeah, I think the similarities are going to be minimal (as in, one quote and problems in court, like in most Shakesperian tragedies).
PS: apart from the quote, didn't Nomura say something like they were inspired by Shakespeare, saying that the quote wasn't put just for sake of looking good? I swear I remember something like that. I've always thought that was the main reason people were drawing these comparisons, not only basing themselves in a quote.