If the Louxemburg king (let's call him Andrew) is banished by the Hussites from Bohemia he would most probably go to his other kingdom, Poland, to make it a basis to reconquer Bohemia. I wouldn't be surprised if Polish knights would try to force some privileges from him for their help. If there is no Polish-Teutonic conflict, the Order might join the anti-Hussite crusade.
Anyway, Hussites would be in worse position than IOTL. Poland was more or less neutral in the conflict, many Polish volunteers fought on Hussites' side. While edict of Wieluń made Hussitism and trading with Hussites illegal in Poland, AFAIR it wasn't enforced too strongly, and in 1433 Poles and Hussites became allies. It wouldn't happen ITTL.
Also, whom would Hussites elect to be their king? Is Lithuania baptized? If not, any Lithuanian ruler is out of the question, even if Sigismund Korybut is not butterflied.