Singapore open campaign against higher-ranked Bahrain on Tuesday.
Singapore open Asian Cup 2019 Qualifiers campaign in Riffa on Tuesday evening.
Japan taken on the Group B strugglers at Saitama Stadium on Tuesday.
The return of the former skipper is expected to boost the national team.
Gomez had led Johor Darul Ta'zim to two MSL titles and AFC Cup glory in 2015.
JDT owner Tunku Ismail Sultan was elected as president at the 53rd Congress of FAM on Satruday.
The announcement was made during the launch of La Liga hub in Singapore on 23 March.
Malaysia were not able to get a positive result ahead of their Asian Cup qualifying campaign.
Lions begin 2019 Asian Cup campaign against Bahrain on 28 March
Table leaders eye South American dominance in Thursday's qualifying clash
A win will ensure Argentina climb back into top-four - the automatic qualifying spots.
V Sundramoorthy's Singapore warm-up for Asian Cup Qualifiers with today's game against Afghanistan.
Despite lack of match practice, Hariss is expected to lead the Lions against Afghanistan.
Thailand host Group B leaders at the Rajamangala Stadium in Bangkok on Thursday.
Bastian Schweinsteiger has been released by Manchester United and the midfielder will join Major League Soccer side.