What kaiju would best fit for a crossover fanfic?

I wanna make sure this fits well in the Total Drama universe.

So far, I've narrowed it down to a few kaijus.

King Kong

Zilla (1998 Godzilla film/the series)

Otachi

Titanosaurus

And King Ceaser.

But I have no idea what timeline would make the most sense and how well it would fit.

Let me explain how it works: Within the world of (fandom), the events of (kaiju movie/s) took place in the timeline. During a fight with (kaiju), it bled during the fight. Some blood landed on the ground, but some of its blood indirectly contaminated the son's ancestor. Basically, (Kaiju)'s blood contaminated the ancestor of that son, and by the time he is born, he is technically half of (That Kaiju).

So... anyone got any advice?