I know Carlsberg was cheated by Chang, anyway, doing a comeback now wont be easy, the established demand is no longer there. Carlsberg used to be one of the main brands and in demand, now it is not. There are a lot of beers in the market, very few make it. Chang, San Mig light, Tiger, Heineken and Singha (Light) are those main brands now, the market probably has 20 more brands available but no demand for them. Leo do well but not there yet.
I do drink Carlsberg whenever I visit Malaysia myself.
Beer bars have limited space, we only stock main brands. Bigger bars can easily stock a lot more, most of the bars are small tho.