One possible idea:
Italy would stay neutral on turn one, but can come in on either side in turn 2.
If Italy joins the Central Powers, maybe the US should get a bonus and enter the war.
Or maybe Austria Hungary suffers a penalty due to Italians living in their borders.

Are there any rules in which the player can choose themselves.
This might add a bit of spice to the game, rather than a player being given a side without their choice.

What if Italy is given a choice to join the Central Powers and fight against the Allies?
This in turn would trigger a one time IPC bonus for the allies, and the US would join the war immediately.
If needed, Austria-Hungary may even cede Trieste to Italy.

Just a thought, let me know your ideas  :-)

Moderator’s action: Added tag [1914] to title.