Don't worry, the truth is most Singaporeans would not invest or even go to Johor, I have more friends who are anti Johor no matter how cheap then keen on Johor, even in this forum, there is probably only a grand total of 5 people here who are super enthusiastic on Johor.
I met 2 pro-Iskandar persons over the weekend to just chit-chat briefly. One of them Malaysian, but may be biased cos he is selling Johor properties. The other is Malay Singaporean.
They both told me something similar: "Wait for the HSR, Iskandar will boom. Just wait and see...."