Very recently, a paper has been published that says:
I plan to incorporate X into my research in the future.
The aforementioned paper was published recently, so the follow up containing X is not published (nor do I know if the author is working on it right now). Would it be OK for me to then to do the research suggested in the paper? The idea to incorporate X into the research was an idea I developed independently, but it also happened to be in the "future work" of another paper, if that makes any difference.