I don’t think there is any chance of a right wing wacko party beyond the sort that we currently have. As I see it there are two scenarios. Which occurs depends on how the Proud boys, militias, and Qannon folk react to the reality of a Biden presidency.
If they slink back to their keyboards and lay low, then I think the status quo is likely maintained. The far right faction remains a critical component of Republican primary base, which all elected Republicans have to accommodate or risk losing their jobs.
However, if instead what we saw at the capitol is just the start of a longer campaign of violent acts continuing through the spring and summer as the patriots of freedom resist the illegal and tyrannical Biden administration. then I think the calculus changes. At this point many who may have liked the movie version of revolution, with the good guys winning taking out the bad guys and no one else being hurt may think different when confronted with the reality of innocent blood on the sand. Then there will be strong pressure for the Republican politicians to cut all ties between these extremists, or risk losing even otherwise safe districts.
At that point those who are still bent or Revolution and outright racism, will be where they should be alienated from both sides without a party of their own. This could theoretically led to a splinter party, but given the nature of these people I doubt that they have the organization or patience to actually do the work of finding candidates and getting them on ballots. The whole point of the movement is that the political system is irrevocably corrupt and can only be solved by armed revolution. So going the third part route is a non-starter.