Ant-Man And Film Continuities

Completely different versions of the characters. Avoiding spoilers. This Hank Pym is completely different from the one I know in The Ultimates and presumably both are different from the version in mainstream Marvel continuity?

The Movieverse progresses. However, I am informed that there are four cinema continuities:

the Movieverse;
the Fantastic Four and the X-Men;
Spider-Man;
Namor.

I have not seen previous FF films and am less inclined to go to the new one now that I have been told that it is set in a different continuity.