I've only started the Temperature Snake CAL but have looked over the pattern for the four other snakes and can say I definitely made the right choice buying the bundle. There is 100% certainty that at all of the "regular" snakes will be made (and soon). The instructions are very clear (as always with June's patterns) and the spotted snake even has an added chart for the spots (which is EXCELLENT if you're a visual-type person).
As for the Temperature Snake CAL - it's amazing! June has provided an immense resource for ANY year-long temperature project. There are worksheets to track your data and detailed instructions for how to figure out your temperature ranges. And to top it all off it's in snake form!