Johore like New Territories of Hongkong?
If only Malaysia is serious, sign a 100 year agreement with Singapore (JTC/HDB) to develop and manage JB Singapore style but with full sovereignty remaining with Malaysia. Let the developers and infrastructure professionals to go in and develop JB into a twin city of Singapore, the same efficiency and security. The tricky part is the law enforcer. The Malaysian govt can be guaranteed of a larger and more vibrant JB with all the features of a metropolis within 20 years. A larger scale Singapore integrated into the smaller Singapore like Hongkong and the New territories. Do they have the will and the vision to want to see that happens?