I'll throw my own predictions into the ring for this as well. By the current set up, a lot depends on whether Britain joins the war or not. I'd assume they will if Germany goes through with the Schlieffen Plan (I don't know if they had any plausible alternatives ready to be deployed at this point otl), though there's reason to doubt the potential effectiveness of it. France is likely to attempt an invasion of Alsace-Lorraine, and with the region crippled by strikes and riots, I wonder if that would tilt things enough for them to pull off a narrow victory. That would certainly be quite the nightmare for the German High Command, especially with their main armies fighting through Belgium.
The Eastern Front is up in the air as well. Russia has more time to prepare, yet its also facing an Austria which needs to focus only on one front and doesn't have a Serbia to try and fail to conquer twice. With Austria focusing on the defensive and Germany focusing on the west, a lot rides on Russia's first offensives.
And finally, I can't see the war going well for Italy if Britain joins. I could be wrong, but I remember reading that Italy was incredibly dependent on British coal imports, which will naturally be gone if they're fighting Britain. Plus, the terrain they're fighting in will hardly be better than what they got to fight an outnumbered Austrian army in otl.
This is all without accounting for the big neutrals of the war, America and the Ottomans.