Better news for Poland ?
After the Anschluss of Austria and the annexation of Sudetenland Germany would probably have tried to annex Elsass-Lothringen to 'liberate' ethnic Germans instead of opting to invade Poland.
Two scenarios are then possible :
1) WW II starts a few months earlier in history, all countries get involved and the outcome is more or less familiar to the real outcome
2) Although the army of Elsass-Lothringen is virtually non-existent, France replies with a declaration of war and a couple of weeks later German troops march into Paris. This time, the Soviet army isn't involved and Soviet generals persuade Stalin to stay out of this war, impressed by the Blitzkrieg. This has many other possibilities :
2.A) Germany occupies most of Western Europe, except for the United Kingdom and the Republic of Ireland, the USA gets involved and Germany is beaten. However, Central & Eastern Europe never gets drawn into this battlefield and although they will come under the influence of the Soviet Union they remain a lot more independant (Yugoslavia-like). This means :
- Eastern Europe's economies are less communist, Germany & Berlin never get divided and the continued presence of Jewish communities ensures a greater prosperity for Europe and more economic pressures for the Soviet Union (possibly a collapse of the Soviet Union in the 50's or 60s instead of the 90s)
- because the Holocaust will only effect jews in Germany and Western continental Europe no state of Israel will be needed with no PLO or Hamas and possibly less islamic extremism (no Osama bin Laden or 9/11 ?)...
2.B) Germany soon occupies Western Europe and before the USA realises what's going on Germany invades the United Kingdom, thus taking control over all the British colonies. This could result in other possibilities :
- a continued presence of nazism with Adolf Hitler living to his eighties or nineties with a Cold War between the German Empire and the Soviet Union with the USA as a distant observer which switches allegiances between Germany and Russia to maintain the balance of power
- a widespread ethnic cleansing and a much more brutal colonisation of all the British colonies, no one would ever hear of Mahatma Gandhi as he would be one of the first to end up in the gas chambers...
2.C) Germany takes over Western Europe (including the United Kingdom). All Central & Eastern European countries quickly align WILLINGLY with the Soviet Union to protect themselves. The USA becomes an ally of the Soviet Union and WW II becomes an even bloodier mess to defeat a stronger Germany than in the original WW II. Atomic bombs get dropped at Berlin and Munich...
You see how such a 'small' country like Elsass-Lothringen could make an enormous difference ? Furthermore, there are probably several other scenarios we could think of for Europe alone (but notice that in most scenarios most of Europe's jews would have been a lot better off !). Also notice I didn't include Asia in all this. What if there never was an alliance between Japan & Germany ? What if Germany took over Nederlands Indië (Indonesia) and came into conflict with Japan ? What if .... ?