Doesn't a gas giant "giving birth" to a moon count? Hot Venus? Radio signal from Jupiter?
No, it doesn't. Velikovsky theorized that Venus was ejected from Jupiter. We have no good theories for how or why a gas giant would spontaneously produce and then eject a smaller terrestrial planet, not to mention no physical evidence that i've seen that it has ever actually happened.
What is going on here is that some of the material in Saturn's rings has accreted together into a moonlet. It's already been theorized that that's how at least some of Saturn's other 100+ moonlets were formed. The only reason that this is at all a surprise is that A: there's still enough material left in the rings after forming all the other moonlets and B: that we're caught it in the middle of the process . And as for (B), i haven't seen any estimates of how long it's been going on, but i suspect that it's been taking place slowly over millions of years, and we're only seeing it now because we've finally gotten sensitive enough instruments in the right position to detect it.
If so then in one case we have a tiny moon, one of over 100, being formed by a known method over a period of millions of years. And in the other case we have the 2nd largest terrestrial planet, one of just 8 planets total, being formed by an entirely unknown method over the period of a couple thousand years.
The first case provides absolutely no support for the second case.
As for "Hot Venus", that doesn't really provide any evidence for Velikovsky unless you don't believe the greenhouse effect exists.
And i don't know what radio signals from Jupiter have to do with Velikovsky's theories of planetary formation, so i can't really address that.
Even if you doubt his line of reasoning, his predictions are very interesting. Perhaps you can interpret his narrative as, at the very least, a very productive muse.
Oh sure, they're _interesting_. But lots of people make interesting predictions from random theories that aren't based on any solid evidence. Some of those people we call science fiction and fantasy authors, and others we call crackpots, depending on whether they think their "interesting predictions" are actually the truth or just a form of entertainment.