Is refusing a job rotation opportunity a career limiting move?

I work in the legal department at a large corporation that's undergoing a big reorganization. As part of this reorganization, several attorneys may be reigned, and I've been hopeful that I will get a promotion in the same business unit of the company where I'm currently working. Many of the executives are backing me strongly for this promotion, as I've earned their respect through years of hard work. The problem is that I was just approached by the company's top attorney with a strong suggestion that I consider rotating to a different part of the company, in the same geographic area but with a portfolio of work that is less interesting to me and a reputation for having a challenging set of executives and programs. It was presented to me as a way for me to develop professionally (it is a promotion to a higher job clification) and not something I had to accept, but I can't shake the feeling that this rotational ignment could prove to be a professional dead end for me and not the best use of my skill set. I also worry that I'm being maneuvered away from my current business unit to clear the way to promote someone else, whom the executives would block if I were still in contention for the position. But if I resist this strong nudge to accept the rotation, would I be perceived as putting my own interests above those of the company and not a team player/company man?