All I can say is this is springtime for the Ottoman Empire. They will absolutely not get involved and take advantage of this to seriously consolidate their position.
There is no Germany, BTW - the Civil War is before unification. If France gets involved in the US Civil War, she's going to be awfully vulnerable...
Well Austria and Prussia will shortly be involved in their own contest of wills within the Confederation, so their position is likely moot, it also makes French intervention there even less likely if they choose to act in the ACW. I thought it was generally France and Britain that supported the Confederacy, for differing regions and with differing degrees of enthusiasm. Russia of course favoured the north. The others don't really matter as they have their own concerns, but if they did they are probably more likely to pursue aneutral course, as they are watching each other....or they pursue a common purpose for the entire bund, and I don't think they are likely to come to a common decision given the nature of the bund.