Last I heard, the prevailing scientific opinion is that the universe is going to continue expanding, not compact back together. And how would life survive a Big Crunch anyway?
More importantly, as Simon indicated, you've just pushed back the origin of things to a previous universe, which doesn't make anything more plausible, just more remote.
I think the real question is whether you've read anything about abiogenesis. The abiogenesis theories out there now make life's formation sound pretty plausible, within our own universe, on this very planet, with no need to pawn off the problem on another place and time.
That being said, it would be foolish for any of us to act as if we can really explain how This all came about. The universe is ultimately unexplainable and probably will continue to be for quite some time. Keep in mind that we just invented the light bulb a little over a century ago. Science has a long way to go before we can expect to know all the answers.