Bad news for Samsung’s somewhat anticipated Android rival: Japan’s biggest carrier reportedly wants nothing to do with it. Recent rumors suggested that NTT DoCoMo would finally launch a Samsung smartphone powered by the new Tizen platform this coming March. It turns out that those were indeed the plans, but The Wall Street Journal on Friday reported that the plans have been canceled. Why? It looks like the carrier had a change of heart and decided that Japan is a two-horse town. “The market is not big enough to support three operating systems at this time,” a DoCoMo spokesman told the paper on Friday. Samsung will undoubtedly fight to change the carrier’s mind about Tizen in the future, and it will also likely do everything in its power to ensure the sentiment doesn’t spread to other wireless service providers in the region.