Pakatan Harapan should not reveal its shadow cabinet before the general election, said DAP secretary-general Lim Guan Eng.

The coalition should instead project its prime minister-designate Dr Mahathir Mohamad and deputy prime minister-designate Dr Wan Azizah Wan Ismail, he told the media at the "'100 Days to Putrajaya" ceramah in Gelang Patah last night.

"After all, it is the winning party that will decide what positions to fill.

"It is up to Harapan to make the call on the timing to announce its shadow cabinet," Lim (photo) said.

MCA religious harmony bureau chief Ti Lian Ker had previously questioned whether the opposition coalition would unveil its shadow cabinet after announcing Mahathir as its prime ministerial candidate on Jan 7.

Meanwhile earlier at the event, DAP international secretary and Kulai MP Teo Nie Ching tried to dispel the negativity surrounding the choice of Mahathir.

"The coming general election is not about Mahathir replacing Najib Abdul Razak or Dr Siti Hasmah Mohd Ali replacing Rosmah Mansor.

”We are speaking of changing the government, and we will have an entirely new cabinet. I really look forward to it because I have been working with a group of excellent individuals," she said.

"I feel grateful because my colleagues are of such calibre and wisdom.

"Just imagine, besides Mahathir as premier and Siti Hasmah as fist lady, we would have DAP deputy president Gobind Singh Deo as Home Minister, and Liew Chin Tong said he would like to be the transport minister," she said.

Leaders like Mohamad Sabu, Rafizi Ramli, Mukhriz Mahathir, Khalid Samad would also be appointed as cabinet members, she said.

"Don't you think this is the Malaysia we can anticipate?" she asked.

There is currently an ongoing social media campaign, dubbed #UndiRosak, urging the public to spoil their GE14 votes if they were dissatisfied with the choices given on their ballot slips.

Mahathir has previously admitted that his comeback as Harapan's chosen premier would cause some backfire.