TLDR:
"With advances in communications and artificial intelligence, itβs not at all impossible to imagine scenarios in which SSN motherships deploy a lethal force of killer torpedoes, capable of remaining on station for days β or longer β while waiting for a victim."
Not just the future but the present for Russia: http://www.abc.net.au/news/2018-03-02/vladimir-putin-boasts-...
> Mr Putin said the high-speed underwater drone also had an "intercontinental" range and was capable of carrying a nuclear warhead that could target both aircraft carriers and coastal facilities.