CBR has an
unlettered preview for FF #15. Doom doesn't appear, but there's some promising-looking stuff with Kristoff reacting to the events of last issue. I love the final panel on the last page.
It seems Nick Dragotta has taken over the art duties from Bobillo early; he was originally solicited as starting on #17. I wasn't sure about him - wasn't wild about his art on Fantastic Four #588, though I know a lot of people raved about it - but I think the more cartoony colouring in FF suits his style better.