Original sentence: As soon as Wikipedia became well-known—around 2005—one scenario of decline after another has appeared, based on various assumptions and allegations.Some suggest that a rival website will appear and supplant it, or that disagreements within the Wikipedia community will lead to the collapse of Wikipedia as a project
Edited sentence: As soon as Wikipedia became well-known—around 2005—one scenario of doom after another has appeared, based on various assumptions and allegations.Prophets of doom suggest that a rival website will appear and supplant it, or that disagreements within the Wikipedia community will lead to the collapse of Wikipedia as a project