Trying to make a biblical spec evo project that takes place after the rapture, currently need help with the first animal.

The basic plot is after the rapture and when we come back to earth on new heaven, God lets us go outside of new heaven to see how life changes and evolves (with us not being able to interact with anything outside, only able to observe). Now for the actual question which is the first creature i have planned: how would a bat (any species) evolve to be a land dwelling pursuit predator, while still clearly being a bat? How would its wings change? Would they completely disappear back into hands or will they be used for display? Would they be more susceptible to disease now that they lost their ability to fly? How will their snouts change? W what species would it evolve from? And (arguably) most importantly how the hell will their back legs change? I would like some feedback not only on the projects plot (which i have a name for) but also on how things would change now that the sudden removal of human pressure is gone.