We can imagine that the coup d'état fails - the possibilities are slim but not non-existent: Louis-Napoleon goes into exile and the conservative national assembly takes charge of the executive in forms similar to those inherent at the beginning of the Third Republic.
The attacks carried out by the Party of Order on universal suffrage may lead one to believe that it will seek to prorogue its legislature given that the presidential office has lost all legitimacy, leaving it alone in power. This grouping is heterogeneous but with the successive failures of the Republic will confirm the takeover of the monarchist tendency - the Duke of Joinville, François d'Orléans, was present to become candidate of the party of the Order after the mandate of L-N. A "quiet" restoration can be imagined to converge with the principles of the Count of Chambord, especially since the Orléans were quick to dynastic fusion (except the Ducesse of Orléans, who defended the rights of Louis-Philippe II).
My feeling is that this republic is doomed because the centrist right-wing actors have not converted to republicanism, as evidenced by the person of Adolphe Thiers. The Republicans are themselves very divided (as usual) but the Republican ranks are even more in the minority while the conservatives are, unlike in 1870, not discredited by the geo-political context.
He is the embodiment of the adage: “in politics, you never die”
So the next step for him is to do as he did before, defender of French national and imperial pride in Europe, even playing the virile protector of the Republic if the monarchy is restored in France (in the sense that he sought to protect the republic facing the coup d'état of the monarchist assembly, speech used in OTL to justify its own coup).
I don't have an opinion, I don't know the matter but a priori there will be no Crimean War like OTL obviously.