LN will eventually be activated there is no doubt about that. but LN is not savior of bitcoin, it is going to be an additional layer on top of bitcoin, a chain that should already work. and will work if there is no spam attack.

in case spam attack started and caused issues with bitcoin, bitcoin cash may be pumped but i assure you it will be temporary because a spam attack against bitcoin can not go on forever. and it certainly won't make BCH "dominant". BCH is just a toy that miners abuse.