>>6411901It wasn't so much that it was random as just poorly executed. The second half was them trying to address the recurrent theme of the manga that Getter energy is treated by some as a danger to the entire universe that must be destroyed at all costs.
The problem is, because so much time went into the time travel arc, they never really properly built up this element, so we get a couple of scattered 'visions of a horrible future' eps before the gods make their appearance and THAT is how they address "OH SHIT! GETTER ENERGY CAN DO THIS?!"