If secondary reputable sources are speculating about something and other reputable sources point this out, then wikipedia should take both under account and indicate the current status. If on the other hand any wikipedia editor is judging secondary reputable (and maybe even stupid speculations within these) sources, he or she is in a wrong place, conducting original research (a clear no-no-no in wikipedia or indeed for any serious encyclopedia). Original research should be published in scientific journals, assessed by peers, pass on in books if scientific community thinks there is any sense and then it will constitute a reputable (and possibly wiser) source to be quoted in wikipedia.