It could be the beginning of a super-human race that will replace homo-sapiens, or it could be the beginning of the end for humans, as tampering with our genome could cause unforeseen mutations that will destroy humanity all together.
Both of these scenarios assume (with no basis whatsoever) that unmodified humans will go extinct.
There's been plenty of films of giant ants and such attacking people.
Argument from fictional evidence is fallacious and allows absurd conclusions, such as that experiments involving cute animals are safe because
Night of the Lepus wasn't scary.