I'm currently thinking up a sequel for this Oungrikos POD. At the moment it has a rather concentrated focus on how the ERE resulting from the general sequence of events detailed on this thread would influence and be influenced by the Italian Wars of the 16th century, specifically the
War of the League of Cambrai and
War of the League of Cognac.
The first of these wars, the Cambrai War from 1508 to 1516, involved Venice which in this ATL would be intrinsically linked with the ERE and it's interests in the Eastern Mediterranean. I highly suspect that Venice being threatened by the expansionist Borgia Regime of the Papal States would elicit a significant response from Romania. When Julius II succeeds and calls for war against Venice for insubordination against the Pope over the bishopric of Vicenza and encourages France, Spain and other major Catholic players get involved he would effectively be calling for a war with the ERE, the one powerful ally Venice could count on.
The best part of two centuries have passed since we left this timeline in 1330 and it remains quite unclear to me how events would've evolved in Hungary to keep it within the Empire this long and not wander or if Romania had yet re-established a foothold in Southern Italy or the Sicilian Vespers conflict had been allowed to proceed as OTL. It's possible through it's influence over the Knightly Orders, specifically the Knight's Hospitaller, that Romania could've established a presence in North Africa by now around Tunis, maybe similar in scope to the
Norman Kingdom of Africa. Suffice to say the Knights should be considered like Venice, intrinsically placed within the Imperial system of the ERE if this is the case.
Ah shit! Here we go again...