Cruz/Trump are the only ones right now who together I believe can form a new party. Whether or not they'd be willing is the question. Both can leave the political arena and leave the headaches behind. Trump is too old to continue to put up with this b.s. I'm afraid that they will now go after him personally and Cruz can't lead this fight alone..
I think any Trump/Cruz alliance has simply been for convenience, not an alliance of any real common purpose. Trump demonstrated this when he began his lies about Cruz immediately after the 2016 Iowa caucuses.
While all politicians must have some narcissism in them, Trump is 100% narcissism, while Cruz has a very high level of true Conservative, Constitutional principled thought. When that thought benefits Trump, Trump is all for it; when that thought is detrimental to Trump, Trump reverts to bullying and name-calling and victimhood.
A lot of good things happened for the country as a result of Trump's election, and more good things would have happened had he been re-elected, but he's in it more for his own ego than for any other reason. Cruz suppressed his ego during the Trump admin when he saw that supporting Trump's position would be good for the country. The two of them can be in alignment when Trump's ego happens to coincide with what the country needs, but that's not a basis to build any new party.
Cruz isn't perfect. I think his vote against the National Defense Authorization Act is wrong on both principled and pragmatic reasons, with a failed and intellectually inconsistent attempt at justification. But even with his imperfections he's a principled thinker and willing graciously to take a back seat. Neither is true of Trump.
Last night's SCOTUS decision is the end of the 2020 election. It was a bad decision, the country is in for bad times, and the fundamental rule of law appears to be dead, but it is what it is. And it's time now for Trump to exit the stage; we should thank him for the good that happened during his admin and wish him well, but any new party or any revision of the R party needs to be free from the distraction of Trump's narcissism.