Five potential timelines
1) British botch delivery of the Zimmerman Telegram, revealing that they are listening in on neutral diplomatic traffic in the US, Mexico, and elsewhere. This backfire horribly and keeps the US out of the war while Germany decides to halt the "rumor" or resuming unrestricted submarine warfare. For added effect, perhaps Germany claims it is a desperate move by the British and that the whole affair is a lie.
2) Italy stays very friendly to Germany but goes on a different path after early 1936, building her empire in a very different way and surviving into the postwar world
3) Japan never attacks Pearl Harbor but instead develops synthetic oil capabilities during the 1930s. Imperial forces still attack colonial holdings and develop a trading bloc roughly equal to "ASEAN plus three" US declares war on Germany in later 1942 and Europe is eventually free. Eventually a tripolar world is formed as Japan, Russia, and the US compete. With the collapse of the USSR in 1994 and a *much* greater push into space, the world is a very different place in 2008!
4) Japanese forces under Toyotomi are more successful in Korea in 1593, creating a very different Shogunate and prompting Japan to start establishing colonies abroad.
5) Events at the Alamo are slightly different with an exiled Samurai taking part in the defense. Though everyone is killed, Texas opens up Japan early and starts a series of events that leads to war between the Western Hemisphere and a perilous alliance between the UK, France, and Germany in 1923.