im stuck help

[Alex K]

There's too much (probably; I'm not a astrophysicist) dark energy for a "big crunch". But big bounce? I've to really looked into that, but given increases in entropy is just seem to outlandish to me. Physics breaks down at T=0 so I guess almost anything is possible?

The Big Bounce is just a combination of Bang and Crunch as a cyclical process. Again this is looking less likely.

If the dark energy is a cosmological constant, which is by far the simplest explanation, the universe is not going to recollapse but will approach an exponential expansion. It could be (though there is currently no evidence) that dark energy comes from a dynamical quantity (christened a quintessence field by theorists). In that case, the value of dark energy could become smaller over time, which would enable a recollapse. There is so far no real evidence for a time-dependent dark energy value, though.