Let's assume that both Sweden and Italy decide to join Germany in 1914/15. Could, after that, also Romania become part of the CP, since the allies are doing better againsst Russia and Romania sees the chance to grab Bessarabia? And with an earlier Russian collapse, who else can be driven in the war on the Central Powers' side: China? The Netherlands? Or can Japan switch the sides?
Little additional thougt: is an Austro-Italian breakthrough on the French-Italian border possible? To disengage the northern trench warfare?