Apparently there is a launch planned in the Muzium Setem Melaka (Melaka Stamp Museum). So far no news of any special postmark.
The launch is planned on 30 April 2015 at 10:00 am.
In this case the Jalan Laksamana cancellation is the nearest to the museum.
If anyone is interested in pre-ordering, I will drop by the museum if there is sufficient quantity to justify the cost. The cancellation that I plan will be Jalan Laksamana and anything from the museum (only if available). If the launch is cancelled, the order will not be processed.
Stay tuned.
Updated 23 April 2015:
There is a planned cachet at the museum!
Updated 24 April 2015:
Here is the image of the FDC with Kuala Lumpur cancellation.
sky52200
myfdc 
hi,how are you? i would like to order one from the melaka museum.
Thank you! I will do that. I will keep you informed by Friday afternoon.
sky52200
Good Morning SKY
Melaka is too expensive for me to get there! if your do extra PSM fdc(2), I would like to make an order.
Thank you. God bless.
Hi, Yes I have spares on eBay at the moment. I made various designs, so it is easier to choose from: http://www.ebay.com.my/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=penny+Black&_sacat=0
Have a great weekend!
sky52200