The 29-year-old centre back has been brought in by the Southern Tigers as they look for a long term replacement for the recovering Antonio.
Soares comes with the experience gained in the Brazilian, German, Norwegian and Israeli leagues playing for the likes of Coritiba FC, Fortuna Duesseldorf and Hapeol Tel Aviv.
At 1.94m tall, Soares is slightly taller than even Antonio, who is a giant amongst the players in the Super League.
JDT are monitoring the situation with Antonio who did his ankle-cruciate ligament towards the back end of the 2017 season but has since done the required surgery.
Antonio has been back in Johor Bahru continue the next part of his rehabilitation but has yet to rejoin the rest of the team in full training yet.
Should Antonio progress smoothly in the coming weeks, Soares is likely to be placed with Premier League side, Johor Darul Ta'zim II where he can learn the ropes in a relatively easier environment.
There's no doubt that JDT will need Antonio to be available if they harbour any hope of reaching the 2018 AFC Champions League group stage.
But even if the elder can find his fitness and form back in time for the new season, age is catching up with him.
With Antonio at 34 years of age, the time is right for JDT to start thinking and preparing ahead, and the signing of Soares ticks all the right boxes.