So it's my understanding that the current models predict that a super massive object will collapse beyond the event horizon into a singularity of infinite density.
My question is the following: isn't such a prediction contradicted by the observable universe, since we observe expansion from the Big Bang? How could a singularity form if at some point in time there was a much more massive and dense object (the Universe) that did not remain or achieved singularity but inflated ?
edit 1: Or in other words, as Tom B. suggested [but see edit 2]:
IF the universe was inside of its own event horizon, which seems reasonable given its huge mass and tiny size just after the big bang, how did it escape?
edit 2 [edited a bit the initial question, comments below]: I believe this question is different from Big Bang snuffed by a black hole? question, because I'm not suggesting that the forces leading to black hole formation would counteract the Big Bang.
I'm indicating that there are two potential instances of singularity in the Universe, the Big Bang t0, and black-hole singularities. The Big Bang singularity (if it ever existed) is not stable and can be observed to have degraded into inflation.
Similarly, shouldn't this observation lead one to think that a black-hole singularity, if formed, would lead to a similar inflation? I understand that the black-hole environment is not homogenous whereas the big-bang conditions were mostly homogenous, but from both singularities' referentials would that matter?