Evolutionists have hundreds of millions of years to study the patterns of the evolution of species and apply this to the future. C'mon, it works both ways, what's my cousin the snail going to be when he is no longer a snail. He's going to have to be something!
Sure, just tell me what environmental changes will take place in the future and what features that the modern snail lacks to deal with these changes. Your question is akin to me asking you what color hair your great, great, great, great grandchildren will have. You have no way of knowing now who subsequent generations of your descendents will marry and have children with. Therefore, at this time it is impossible for you to even pose a reasonable guess as to the answer to my question. That doesn't mean that the laws of genetics don't work. It just means that you have insufficient information to answer such a question. Similarly, there is insufficient information available to determine the future evolutionary course of any given modern organism. As I said earlier, absent any changes in the environment that modern organisms aren't able to currently deal with, there should be no evolution. Evolution makes no requirement that ALL species must undergo major changes over time. If an organism is well suited to its environment and that environment doesn't change, then that organism will remain relatively unchanged.