There seems to be an obvious contradiction between the predictions of the physics of black holes and the Big Rip, a predicted event about 16.7 Gyr in the future where local groups, galaxies, solar systems, planets, and even atoms will be torn apart. More loosely bound items will be torn apart before more tightly bound items, but would this include black holes, which are thought to casually prohibit escape across the event horizon?
The possibilities as I can conceive of them:
- Black hole will be evaporated close to the 16.7 Gyr mark as the expansion increases the rate of Hawking Radiation
- The cosmic even horizon will approach the black hole's event horizon, getting asymptotically closer, forever or until the black hole evaporates according to our predictions for a black hole
- The universe doesn't completely tear itself apart at all, as matter on the scale of local groups falls into itself, even though the separation between local group increases in a big rip, the local group itself becomes a black hole and experiences a local "big crunch"
That last one is a big stretch, but it was my main take-away from reading this one really weird (and now defunct) alternative physics website. I found it insightful, regardless of whether it has physical merit or not. This question has been asked in other places before, but didn't seem to have a very informed set of answers.