Terrapin_Station

(A) There would need to be evidence of many different species emerging independently through some (very difficult to imagine) abiogenesis-to-relatively-complex-organism instantaneous occurrence (it would have to be from abiogenesis to relatively complex organism more or less instantaneously, with no developmental stages, otherwise we're back to evolution). And (B) we'd need to be able to alternately explain the present evidence of genetic shifts producing different species--we'd need to be able to explain what was really going on that gave the appearance of what we now classify as evolution.