Yes, eternity can be viewed as both more complex and, yet, equally nonsensical. Like ex nihlio creation from nothing, it is an effect without a cause or a cause without an effect depending upon how you choose to look at it. You can also treat ex nihlio creation as an effect without a cause that eventually leads to the destruction of everything with, of course, nothing left.
The big bang presents an example of this last. If spacetime was created in the big bang there was no time before the event. If the big bang had no seed but was a completely random event from out of the blue, then it was ex nihlio creation. If the universe collapses again and all the matter and energy in universe cancel each other out, then there will be nothing left. Ex nihlio creation leading back to nothing and starting the cycle all over again.
Note that my example is very similar to the idea of eternity. Logically and mathematically or whatever, both eternity and ex nihlio creation inevitably lead to the concept of a singularity, a paradox.