So Chinese researchers supposedly found this virus in the Mariana trench, and they say it has a super-complex genome.

If you bring something up from that deep, it usually explodes.

Would the DNA be ripped apart into fragments or scraps?

Maybe then those fragments could be spliced into a common virus, but no one would have an isolated sample of the novel virus?

Vaccines would contain only DNA scraps rather than dead whole viruses. Hmmm…