So I'm writing part of my Tudor Timeline (insert shameless plug
here) and dealing with the goings on in Central Europe of the 1520s. The rough plan so far is as follows: Louis and Suleiman still go to war over Hungarian tribute to the Ottoman Empire, but here Louis manages to get some Imperial support (Philip the Fair survives, and I imagine him more willing to help his son-in-law then Charles). This leads to a much better showing for Hungary, and while Suleiman manages to get some castles in Serbia, he doesn't get Belgrade and after three years everyone is ready to give up. Except that in 1524 Sigismund the Old wants to join the war (the reason: ITTL Aleksandra Lisowska [OTL's Hurrem Sultan] becomes a minor celebrity (and Sigismund's mistress) with the story that she managed to break free of Ottoman slave traders, and Sigismund wants to beat the Turk and, in his dream of dreams, free the women of the harem).
My questions are as follows:
1) How would Imperial help impact the Hungarian showing in the war? I have it initially leading to a stalemate, but would another outcome be more plausible?
2) Assuming we are at a stalemate in 1524, would the Polish military help push the Imperial-Magyar forces over the top and, if so, what's the most plausible endgame for the Christian forces, assuming we don't get the fever dream of retaking Constantinople?