I don’t have Omnisphere, as I don’t think my music will be “automatically better” after buying it. However, without a doubt, I do believe that Spectrasonics are making incredible products. These are the best you can ever get, even for that price. I like their price offers, there are “no price offers”. It shows that they can still take profit out of that and shows me and others that the products deserve to be at that price point too.
The library is huge, and with the 2.5 version they have made a big step forward in terms of original audio manipulation aka. using your own sounds to make it even more “original”, what HZ is always recommending to do.
I have “Iris 2” from iZotope and think it’s great even for what the regular price, however, PluginBoutique had a great offer last year to give it away for free. Iris has a lot to offer as well, and if you don’t have it, check that out as well, although I didn’t use it for trailer music.
If you actually have the NI bundle, you should have all sounds you need in order to succeed in that genre.
As I said: There will be never a 100% guarantee that your music will be “better” or more “licensable” after purchasing a specific product, so my only recommendation to you is that I do believe that investing in yourself (education) is in first place the better way to go.
What I hear in trailer music, and actually many others genres too, that the people who has more, have way more success, than the people who bought the whole “world” and think they are in advantage. However, skills will win all the time, no matter how much you have.
I am saying it to you, because I am not the only one who thinks that way. There are plenty of success Hollywood composers who think that way too, although they could buy anything they want. But they don’t.
Take care of yourself!