Two weeks after the disappearance of MH-370, a French satellite collected images from the Indian Ocean. Years later, a selection of images that showed some floating objects were turned over to Australia. Thorough analysis strongly suggests several large man-made objects were floating north of the zone that had been thoroughly searched.
Is this sufficient to restart the search? Possibly, but the Aussies should probably get other images of scenes nearby from that satellite to further refine the analysis.
This is a case that screams out for better technology for searching oceans. How about a nuclear-powered autonomous robot that can do the job 24X7 for as long as it takes instead of constantly having to resupply vessels loaded with humans? How about using submarines that can work in all kinds of weather? How about armies of these things so that parallel processing can get the job done in a decent period of time?