It would be very easy to incorporate feathered dinosaurs into the sequels - by arguing that, as we started to recognize dinosaurs having feathers, scientists working at Jurassic Park/World started to incorporate bird-DNA into the dino genome. If they can feature a genetically modified ridiculous concoction as Indominous Rex in the Jurassic Park universe, surely, those scientists can add feathers to dinosaurs. I'd be interested to see what a reboot of JP would be like.