Map Shows Why Critically Endangered Rhinos Struggle to Survive Kind of odd- the plan for the Sumatrans is to bring them together, but the plan for the Javan is to split them up
good article on 1984 Sumatran rhino meeting 1984: the meeting that changed everything for Sumatran rhinos
That's because the situations for the two species differ- Sumatrans are fragmented so much that individuals never meet, Javans on the other hand are all in a single reserve with inherent risks of that.
Sumatran Rhino captured for captive breeding. On Borneo First wild Sumatran rhino captured in urgent bid to save species
Well, this could be good news- but it depends on her age and whether they have better luck/skill in managing her captivity than the last one.