So, based on this screenshot from the new Sims pack's gameplay trailer with the crests in the new pack:
I'd estimate there to be maybe around 35 crests (very rough math) if we're lucky. For context on how I got 35, taking into account scroll increments/speeds, I'd estimate about 3 block or "pages" of 9, maybe with some extra at the bottom, so probably no more than 35 3x9=27, with some extra depending on scroll increments and excess space
To be specific, I'd estimate 31 or 32 crests.
Mostly because I'd guess 3 blocks of 9, 1 extra line of 3, and then an excess of maybe 1 or 2 (cuz EA never gives us a neat full list).
I don't know why I did the math, either, so don't ask. Anyway, this is all based on that single screenshot, so take this with a grain of salt, seeing as things can sometimes change before release.