No where near enought space for all 4 species. Though i guess you could get rid of the animals currently there.
Without getting rid of the elephants, there is still not enough space for those species. The house was designed to give as much room as possible towards the elephants, hence the large off-show areas (well that's what a keeper told me once anyway). The hornbill avairy is the only enclosure which is large enough to be a suitable enclosure for the fishing cats or muntjac. The tapirs and leopards would need a lot more space...