Last time bio signatures where found (I believe on Venus), there was a flurry of papers on arXiv a week later, which all explained the signature by abiotic processes. Of course, if you have more than one explanation, then you really don't have one explanation. So I fully expect the same thing to happen here, and perhaps sometime in a decade or so follow up observations will have ruled out all but one explanation, until then exciting but ultimately it's not over before the fat lady sings.