I would like to hear your educated opinion on the following points.

1) Nothing, time began and so did the universe at that moment.
2) However if you believe in the multi-verse, string theorists hypothesize that the big bang was the collision of two universes. There are many more hypothesis some stronger than others.
3)Hawking Radiation
4)Depending on the cosmological constant, the universe with either keep on expanding (gravity between all the objects in the universe does not overwhelmingly attract), become stagnant and static (gravity eventually equals out) or there will be a big crunch or reverse big bang (gravity overwhelms all masses in universe)
5)Given the data we have in evidence of the big bang, CMB and 3K temperature, it is a strong indication that the 2nd law is universal

>>7809175
How do universes collide, wouldn't there need to be something that contained both universes? Sounds paradoxical. And isn't the universe geometrically flat?

>>7809188
No space time is (as far as we know) "flat" which means euclidean geometry works.
That has nothing to do with being flat as you and I imagine it