About a year ago, a foreign researcher invited me to co-author a review paper with him. He had already a 50 page long draft that needed editing and improving. After I was done with it (literature review, re-writing big parts of the text, adding big parts to the text, enlarging the bibliography) the paper was 70 pages long; submitted, accepted, in press. So far so good.
A few months later, he invited me to co-author a follow-up review, to which I happily agreed. This time his draft was of a poorer quality, so in fact I re-wrote it from scratch, using the first version as a skeleton or table of contents.
After I finished and sent him the paper, he stopped responding to my e-mails since several weeks (I don't know him personally). I fear he might want to submit the paper without including me as co-author (it's a justified fear, but I'll refrain from describing the details of our collaboration).
What can I do if this will indeed happen? In its current form, the paper is partially my intellectual property, and I don't allow to publish it without me. I have all the source files and e-mails regarding this work. Could I write to the publisher explaining the situation and demand to withdraw the paper?