Granted, this would be a lot of people, but I think it'd be a midrange of "kinda religious, but not enough to dive in"-types who are mostly freaking out over the revelation.
I’m sure they came up with an elaborate story how Jesus loves sentient mollusks from Alpha Centauri, but I hope most people are smart enough to realise how little sense it all makes. I for one am curious how this plays out, if I’m lucky enough to witness it.
At the end of the day, the Catholics (at least) don't believe they were given full knowledge of the universe at some arbitrary point in the past. Instead, we were plopped into it and expected to explore and understand it. This will require us to occasionally update our teachings - just like how scientists need to update their teachings when they discover they didn't understand something before.
It's unbelievably obnoxious to simply assume everyone who doesn't scoff at religion simply isn't "smart enough". You clearly haven't taken much time to understand the topic if you can't come up with even one good argument. Even Richard Dawkins is able to connect with religious logic to a degree.
I think the idea of Imago Dei is actually the most believable part. I am absolutely convinced that we're the forerunners of this universe. The first scenario where a creation becomes aware of its creator - even if I'm imagining the wrong architect.