Yes, bears would definitely be up there.
A century ago, big cats, bears, great apes and elephants were the most popular animals in any zoo and very little has changed in that regard. Due to their relevance to pop culture, bears have remained popular with young and old alike.
We also just don't have anything like them in our zoo's. I can fairly confidently say we won't see black, brown or grizzly bears reimported. Nor spectacled from SA. So our asian species are what we have left. With sun bear being the smallest and most numerous in captivity outside of zoos. I can't see us moving away from them.