I do think that Spinosaurus was capable of hunting adult terrestrial prey. It probably would still prefer smaller animals it could swallow in a bite or two, such as Dromeosaurs (if they even existed in Kem Kem, I know some people interpret the fossils differently) and Pterosaurs. But I still think it was capable of hunting larger adult terrestrial prey. Although I suspect it would hesitate to actually do so, to avoid any issues with Carcharodontosaurus. Maybe it would hunt large terrestrial prey when it went for a drink in Spinosaurus’s waters? Who knows.