"That is, you have to predict what could possibly happen genetically in the case of a micro/macro evolution, say, you should be able to predict under what random selections that a heart or a brain or an eye can possibly be formed through the theoretical process."
I'm not sure i understand what this means, but I can tell you that we have confirmed , via empirical observations, every single mechanism of evolution, including natural selection, mutation, and genetic drift. Also, while mutations may be random, selection most certainly is not.
In terms of science this is as hollow as we have empirical observations, every mechanism of chemistry, including <whatever chemical> that chemical reactions do occur.
Predictability on the other is that,
before lab I predict that,
2H2O = 2H2 + O2
after lab shows that the above prediction is 100% realized. If not you deserve a Nobel Prize!