I read somewhere that Sudeten German leader Konrad Henleins ambition was to be Czechoslovakia's first Sudeten prime minister, before the idea of annexation of the Sudetenland to Germany took over.
After the 1935 elections, he led Czechoslovakia's largest party in terms of votes (but not seats initially, the Czech Agrarians had a one seat lead, but future defections from another Sudeten party would put the Henleins SDP over the top).
As the leader of the countries largest party it would make sense for him to try to cobble together a coalition government of all those parties on the outs in Czechoslovakian political life, his own SDP, the Hungarians, Slovak autonomists etc., but he still needed some Czech support as well, most likely from the Agrarians.
In RTL, I don't know how seriously he tried to get such a coalition going, nor how possible Czech participation would have been.
I do know that when the parliament was voting on a new president, the SDP was planning to vote for an anti-Benes candidate, a Czech professor I believe, and such a vote would have been a test case for a "coalition of the disaffected" of Czechoslovakia, but then the SDP backed out of the plan and I think abstained in the vote instead.
Some possible results of a Henlein led Czechoslovakia might be that Germany is satisfied with a close alliance with such a regime, (and here getting a Czech participation in such a government is going to be tricky), and doesn't mess with its borders, going after Austria, then the Polish corridor region in 1938. Perhaps a Munich style conference about Germany's demand for Polish territory.