I just finished reading the X-Men and Dark Avenger comics from the Utopia crossover and have a few questions.

-Has Namor explained his reasons for joining up with the X-Men?
-When Emma and Scott come clean with one another Emma reveals that she's been doing some naughty stuff with Tony Stark and Namor. Were those affairs recent or was this before her relationship with Cyclops? If it was during their relationship then I must say that Scott took thing rather well.
-When did Danger become one of the good guys? Its assisting the X-Men, but the last time I saw Danger it was trying to kill the X-Men in Whedon's Astonishing run.
-There is a dude in an all white suit with a white top hat. Is that Fantomex? If so, when did he come back?