Possibilities
There has been few rumors about the next iPhone. Many people assume the next revision is this summer, as evident from the past. However, we don't know whether it will be LTE, dual GSM/CDMA, etc.
I am going to get my iPhone 4 on Verizon the morning of the pre-order date. If I get it now, and speculation that it is not going to be LTE this year, I will get an LTE iPhone sooner rather than later although it may take two years, as I plan to own an iPhone with Verizon. That's how I look at it.