I make two predictions:
1. A massive chunk of what is called the Dissident Right today will no longer be a part of the Dissident Right within five years. This is because of two dynamics. First, being part of the movement means getting used to an aggravating slog of impatience, hysteria, infighting, stakesmanship, and loss. People doomscroll through rageporn, purity spiral through internicene fights, and never see good news as good news. Even when something good does happen, the expectations for the aftermath of that small victory never match up to the reality of it. If Trump wins, expect a whole lot of people to jump ship because the dead haven't risen and the New Jerusalem hasn't descended from Heaven on account of his election victory. It'll be even worse after he does a single pro-Israel action in office. Same goes for if harris wins, since that'll mean yet more years of things going south domestically, and the human psyche does not tolerate the same grind forever.

A lot of people are going to depart because the Dissident Right is really, really hard on their guys. Seriously, the moment someone says that something is degenerate everyone has to argue about it until it's taken as a given that you have to abandon it. Oh you like pop music? Degenerate. You like a food with some no-no ingredients? Poisonous hormone disrupters. Oh, you have a nerdy hobby? Soyboy. You like jogging, huh? I guess you don't lift, weakling. The catty control-freak way that the mass of angry kids seeks to police every aspect of their compatriots' lives is going to break a lot of guys. This counts doubly for every loss, with a lot of men questioning whether upbraiding their entire lives was worth it just to please a bunch of anonymous randos online; add the fact that not listening to “degenerate” music doesn't make the migrants go away, and people will inevitably fade into racist libertarianism.

2. A massive chunk of the Christian Nationalist movement will apostatize from the Christian faith within five years. The more hardcore of the membership of that movement have imbibed the viewpoint that something is worth believing only if it is based. Few of them will have studied apologetics seriously, let alone studying the Scripture outside of way to torture various Bible verses to form prooftexts for a political worldview. If someone starts teaching them certain truths from Scripture which they interpret as impacting their vision (for instance, ethnos applying to subdivisions of race more than race itself – remember that Scripture teaches that Ammon is a separate “nation” from their cousin nation Israel), then this will lead them to a decision. Do I do the reasonable thing and adjust my worldview? Or do I jump ship to swim to more based shores? Given how many have switched from theonomy to Roman Catholicism to Orthodoxy to Lutheranism and back to Evangelicalism in recent years, I don't have high hopes for that particular type of personality.

Similarly, there is a de-emphasis on matters of soteriology in Christian Nationalist circles which will lead to much apostasy. This is natural, as the movement is political. Nonetheless, many in the movement reflexively refuse to trust any clergy at all; this is also understandable, as most ministers are about as faithful as a pile of pig shit. But that means a vast amount of Christian Nationalists, who are too institutionally-minded to join the Catacomb Synod, will relegate themselves to being extremely online, where the only things they will hear are Law and doomposting. Just like the Dissident Right as a whole, promises made politically and grand gestures of a bright future, even if they come true, will not make satisfy nor make up for the loss of regularly hearing the Gospel. For such people, living the All Law No Gospel lifestyle is simply untenable; they will either burn out, become hypocrites, or ramp up their efforts until they end up dying of a heart attack at 27 years old.