I think two stolen passport holders on board would be too much of a coincidence.
the two stolen passports are not coincidental. both were used to buy tickets at the same time and the tickets are sequentially numbered. so at least its clear the stolen passport guys are linked.
what isn’t clear is if it means anything. just read a report from an interpol guy who said people get on planes all the time with stolen passports.
Those two and they are investigating at least two more. No coincidence