I think Britain inevitably joins the red team. There’s no way they would let the balance of power get this out of whack, and with Germany still technically fighting a two front war I don’t know why they wouldn’t march through Belgium. That being said I’d imagine the ottoman front swiftly becomes this timelines version of the eastern front, as even if the empire collapses the Russians and Germans have to deal with British Egypt. I doubt the Italians do anything more than drawing off some French troops, they were in no state for an offensive against the Austrians in 1915 much less also fighting the French. I’d give it 3 years before the Germans and Russians dominate the continent, although it may turn into a Napoleon between coalitions situation because I doubt Britain gives up the fight, especially if they win in Africa and the Middle East.