Beyblade/WMG

Ray's parents were abducted by aliens.
What? We never see Ray's parents, or hear anything about them. They probably wanted Ray too, but he managed to escape. He kept quiet about it because obviously no one would believe him. At some point he and the White Tigers will go on a mission to save them. Stranger things have happened on this show...

All bit-beasts can talk.
Only Dragoon (and dub-only Dizzi) have been shown to be able to talk, but it's possible that the other bit-beasts are able to talk as well. They probably just don't feel that they have anything interesting to say.

Kai and Tyson are related.
Yeah, yeah, shoot me. I still maintain Hiro looks like an older Kai.

The HMS concept never truly caught on, and only lasted a few decades until traditional materials defaulted.
...And a new system taking advantage of combustion is researched. Technically a census well after the generation in G-Revolution made Kenny's young profession in Beyblade improvement much younger. While BEGA had truly disolved after Boris' sentencing was over, everything worked on in the Heavy Metal System period hung on census by the World Beyblade Battle Association. Eventually, his shop closed and it was back to familiar ground. Simply put, amplifications in the metal alloys are too risky for hapless destruction with inconsistent tournament qualifiers. But a random technician will find a way to use ember generation legally for advantageous equality.

The Metal Fight saga takes place in Humanity's second-possible reemergence.
Every family of the Bladebreakers and other heroic teams had prospered for uncounted centuries until a son is born and merged with all legendary beasts. This period in time marks an uncertain end to humanity. After what seemed like a billion years Earth has virtually reset itself with a pale sun. In a nutshell; these newfound gods had gathered all constellations and cloned them to make pretty much every legend blade that exists. Nemesis is an 'absorbed' collection of dormant dark energy from heretical spirits.