Is Not Pre-Ordering Omnibuses Risky?

Odd question maybe, but as I’m sure a number of you know, we’re finally getting omnibuses of the DC Marvel crossovers and Amalgam.

I love this kind of insanity, and absolutely DO NOT wanna miss out, I already have a place in mind to get them for about 100 each but I genuinely don’t know how many omnibuses are generally printed and end up in the wild.

I’ll probably be putting in to get them (and the Dazzler one that comes out about a week later) anyway to ensure I don’t miss out, but it may be good for future reference.

I know it’s mostly going to come down to case by case, like how you can get the first three volumes of Man of Steel for 30 each on Amazon but volume 4 is in the hundreds, or how there’s somehow a crazy amount of Dazzler Masterwork volume 3 out there but 1 and 2 are a bit more pricy.

Anyway, thanks for any help you can provide.