The next issue is Malaysian Made Vehicles Series 4. The original date of issue was on 27 March 2014. The date has been moved to 14 April 2014 (still tentative).
There will be 4 denominations: 60 sen, 70 sen, 80 sen and 90 sen. A miniature sheet with a face value of RM 5.00 will also be issued. The blank folder is RM 6.00.
Earth Hour issue might not be issued after all.
I will give you an update when Pos Malaysia releases more information.
Updated 26 March 2014:
Pos Malaysia has indicated that this issue will be postponed further to 27 May 2014.