Predominant, but specifically in terms of pondering instead of dominating. Something which has a monopoly or superior influence on your thoughts or senses, even though other things of the same type might exist.
The humans trapped in the Matrix were mostly unaware that the preponderant universe they experienced was digital.
To most people these days, Tiger Woods is the preponderant golfer.
The preponderant city shrouded its population in a blanket of smog, allowing them to forget that other cities even existed.