Sean Connery = Fake. Different ways of telling this, but one obvious one is that Mr.Connery's authentic signature slants to the left, this signature slants to the right.
Example:
http://www.autographworld.com/sigs/show2.asp?item=775
X-men = not sure. I think fake though. The James Marsden looks like it could be authentic,
Example:
http://www.autographworld.com/sigs/comp ... ln=Marsden
But the others, like Patrick Stewart doesn't look authentic. Which makes me think they are all forged.
Natalie Portman = incredibly hard to obtain in authentic form. This unfortunately is not authentic either. The slant is too far to the right, the letters are too close together.
Kirsten Dunst and James Franco = The i in Kirsten and the D in Dunst are the easiest to spot as wrong.
Example:
http://www.autographworld.com/sigs/comp ... n&ln=Dunst
And James Franco, is wrong in so many ways. The F in Franco is most obvious.
On top of that, bright and weird colored sharpies are almost never real.
Christian Bale = Too round, his signature is more pointy.
Example:
http://www.signaturepieces.com/auction/ ... sp?item=54
Kevin Spacey = Doesn't look even close to the real thing
Example:
http://www.autographworld.com/original/ ... p?item=576
Pirates of the Caribbean = Orlando Bloom full signature, Keira Knightley full signature, that just never happens. Orlando gives you an OB and Keira gives you a KK. They have been doing this even before the Pirates movies came out. Besides that, the signatures are horribly forged too.
Winona Ryder - Geena davis = Couldn't find any authentic examples of Winona Ryder, she is a notoriously bad signer. So they are hard to come by. And I compared the Geena Davis with my own, and it doesn't match.
John Williams = I am not familiar with this signature and I couldn't find any examples to compare it to. But if bought from the same seller as any of these other ones, I would doubt authenticity.
Although I compared the signatures with more then one example, I listed autograph world as a source, because they are one of the most reputable dealers out there. And I don't have the time to scan in examples from my own collection.

Sean Connery = Fake. Different ways of telling this, but one obvious one is that Mr.Connery's authentic signature slants to the left, this signature slants to the right.
Example: http://www.autographworld.com/sigs/show2.asp?item=775
X-men = not sure. I think fake though. The James Marsden looks like it could be authentic,
Example: http://www.autographworld.com/sigs/compare.asp?fn=James&ln=Marsden
But the others, like Patrick Stewart doesn't look authentic. Which makes me think they are all forged.
Natalie Portman = incredibly hard to obtain in authentic form. This unfortunately is not authentic either. The slant is too far to the right, the letters are too close together.
Kirsten Dunst and James Franco = The i in Kirsten and the D in Dunst are the easiest to spot as wrong.
Example: http://www.autographworld.com/sigs/compare.asp?fn=Kirsten&ln=Dunst
And James Franco, is wrong in so many ways. The F in Franco is most obvious.
On top of that, bright and weird colored sharpies are almost never real.
Christian Bale = Too round, his signature is more pointy.
Example: http://www.signaturepieces.com/auction/showbig.asp?item=54
Kevin Spacey = Doesn't look even close to the real thing
Example: http://www.autographworld.com/original/showbig.asp?item=576
Pirates of the Caribbean = Orlando Bloom full signature, Keira Knightley full signature, that just never happens. Orlando gives you an OB and Keira gives you a KK. They have been doing this even before the Pirates movies came out. Besides that, the signatures are horribly forged too.
Winona Ryder - Geena davis = Couldn't find any authentic examples of Winona Ryder, she is a notoriously bad signer. So they are hard to come by. And I compared the Geena Davis with my own, and it doesn't match.
John Williams = I am not familiar with this signature and I couldn't find any examples to compare it to. But if bought from the same seller as any of these other ones, I would doubt authenticity.
Although I compared the signatures with more then one example, I listed autograph world as a source, because they are one of the most reputable dealers out there. And I don't have the time to scan in examples from my own collection. :D