So, my situation is as follows: I submitted a paper to a journal and continued to work on that line of research, specifically on the open problems I mentioned in the submitted paper.
Now, in the received reviews the referees call for more content in the form of addressing one of the before mentioned open problems in particular. I am fine with adding more content, especially since I have already done the work.
However, the solution to the problem fills an additional 25+ pages, an amount which would pad the paper to a very long length. I am not sure of how to proceed as I am quite convinced that merging the two projects would be too long for the journal.
I don’t know if I should
- merge the projects and hope for it not being too long,
- disagree with the referees opinion in my revision and state the situation,
- contact someone and get information before conducting the revisions?
Maybe as a more general question, how is it in general perceived to get a large lengthening in return to a call for more content?