Originally Posted by psylockolussus
Yes it will.
All of the characters in these movies are not recognizable to the general audience except for Wolverine and Jean Grey.
Giving Famke Jannsen a solo poster and inviting her to the premiere/press releases aren't really expensive.
She'll probably have to do 2 full days of the press junket so it's not like a casual invitation. It's not something an actor like Famke would just jump at the chance of doing.
But also you're ignoring that the previous X-men cameos (Prof X in Wolverine Origins and Wolverine in First Class) were uncredited. Famke's appearance will be credited and she is part of the promotion of the film. So, I am expecting more from Jean than just that one dream sequence.