If there is mass migration from Venezuela, it will probably be by boat. There are no roads between Venezuela and Panama.
Southern Panama is jungle with no roads, called the Darien Gap. There are migrants who go through it, mostly from Haiti and the Caribbean, because they have been sold into slavery by the cabal and have no choice but to try and make it to the US. But to have many thousands go through the jungle trails? I'm not so sure…..
Impossible to bus them–there are literally no roads. There is not a vehicle route connecting Central and South America.
Yes, there have been hundreds of thousands migrating to Colombia or Brazil. Since the Colombians and Brazilians in the border areas are poor themselves, it is a very challenging situation down there. Colombians pouring pots of old piss onto sleeping Venezuelan migrants on the street below is quite common.
This may be a controversial view but I think it actually doesn't matter who was in charge in Venezuela, hyperinflation seems to happen down there about every thirty years, just as it did in Peru in the 1980s and Chile in the 1950s.