Evolution is wrong in the sense that we don't yet have a complete picture (and may never have), hence there are details we have missed, and hence there may be a few things that think make make sense that don't actually. And we'll know that when we learn more. Or at least we'll know more when we know more. It's an ongoing process.
And of course, life on earth could have been seeded from elsewhere, but that doesn't help explain anything right now. We'd just have to figure out how life started elsewhere.
If life did come from elsewhere and then evolve here, I was guess that only one life form was originally involved. Our DNA has us all too closely related for there to be too much variety in the beginning.
Creationism is just a bunch of bull. It contains no science and it is so full of prejudices for the Genesis story that it has nothing to offer, no matter how it's theories are put forth. The only thing creationists are good at is incredulity, as they repeat their mantra, "That's can't be right!", each time natural alternatives are offered up as arguments against their god stuff.
That phrase is the closest they come to being scientific. Which means they don't get close at all.
Oh, and the age of the universe thing. That too might be adjusted if we find any new ways to measure the minutia. And we may find out that things like the speed of light or other factors qualify as variables rather than constants. People are looking. Theyh'll let us know. In the meantime, it is pretty safe to go with the 14 billion year old thing. We can be pretty confident that it is closer to the real number than the biblical 6,0000 year old one.
If it important to anyone to consider yet more theories, read this article. It is about the possibllity that our universe is a computer program, possibly set up to create alternative ancestral histories or to study such things. And they might be able to test for such things. http://techland.time.com/2012/12/13/red-pill-blue-pill-is-the-universe-just-a-giant-computer-simulation/
That ought to keep you out of your comfort zone for a few minutes.